Unit outline_

PHYS2013: Astrophysics and Relativity

Semester 2, 2025 [Normal day] - Camperdown/Darlington, Sydney

This unit of study builds on the foundation provided by Junior Physics and first semester of Intermediate Physics, to provide introductions to Cosmology (Structure and evolution of the Universe), and Special Relativity (Space and time at high velocities). Practical: Experimental Physics is taught as a laboratory module and includes experiments in the areas of analysis of stellar images, electromagnetic phenomena, electronic instrumentation, quantum physics, and other topics. Assessment is based on mastery of each attempted experiment. At the end of the semester students may work in teams on a project. Students prepare a written report and oral presentation on their project or one experiment.

Unit details and rules

Academic unit Physics Academic Operations
Credit points 6
Prerequisites
? 
(PHYS1003 or PHYS1004 or PHYS1902 or PHYS1904) and (PHYS1001 or PHYS1002 or PHYS1901 or PHYS1903 or PHYS2011 or PHYS2911 or PHYS2921)
Corequisites
? 
None
Prohibitions
? 
PHYS2923 or PHYS2913
Assumed knowledge
? 

(MATH1X21 or MATH1931 or MATH1X01 or MATH1906 or MATH1011) and (MATH1X02) and (MATH1X23 or MATH1933 or MATH1X03 or MATH1907 or MATH1013) and (MATH1X04 or MATH1X05)

Available to study abroad and exchange students

Yes

Teaching staff

Coordinator Scott Croom, scott.croom@sydney.edu.au
Laboratory supervisor(s) Mohammad Rafat, mohammad.rafat@sydney.edu.au
Lecturer(s) Tim Bedding, tim.bedding@sydney.edu.au
Scott Croom, scott.croom@sydney.edu.au
The census date for this unit availability is 1 September 2025
Type Description Weight Due Length Use of AI
Written exam
? 
hurdle task
Final examination
Written exam
45% Formal exam period 2 hours AI prohibited
Outcomes assessed: LO1 LO2 LO4 LO5 LO6
Practical skill Early Feedback Task Experimental Lab: Logbook week 3 - early feedback
Assessment of work within lab and weekly log book for week 3. Acts as #earlyfeedbacktask.
1.4% Week 03 3hr AI allowed
Outcomes assessed: LO3 LO4 LO5 LO6
Out-of-class quiz Special Relativity assignment 1
Mastering Physics
2.5% Week 05
Due date: 01 Sep 2025 at 23:59

Closing date: 11 Sep 2025
approx. 2 hours AI allowed
Outcomes assessed: LO2 LO4 LO5 LO6 LO1
Written work Experimental Lab: Summary 1
Summary and discussion of results from experiment 1.
5% Week 06
Due date: 14 Sep 2025 at 23:59

Closing date: 24 Sep 2025
2 pages AI allowed
Outcomes assessed: LO3 LO4 LO5 LO6
Out-of-class quiz Special Relativity assignment 2
Mastering Physics
2.5% Week 08
Due date: 22 Sep 2025 at 23:59

Closing date: 02 Oct 2025
approx. 2 hours AI allowed
Outcomes assessed: LO1 LO2 LO4 LO5 LO6
Written work Experimental Lab: Summary 2
Summary and discussion of results from experiment 2.
5% Week 09
Due date: 12 Oct 2025 at 23:59

Closing date: 22 Oct 2025
2 pages AI allowed
Outcomes assessed: LO3 LO4 LO5 LO6
In-person written or creative task Cosmology quiz
In class written quiz.
5% Week 12
Due date: 30 Oct 2025 at 10:00
30 mins AI prohibited
Outcomes assessed: LO1 LO2 LO4 LO5 LO6
Written work group assignment Experimental Lab: Draft Report
Draft of experimental lab report
2% Week 12
Due date: 28 Oct 2025 at 23:59

Closing date: 07 Nov 2025
4 pages (+references and reflection) AI allowed
Outcomes assessed: LO3 LO4 LO5 LO6
Presentation group assignment Experimental Lab: Presentation
Experimental physics presentation
6% Week 13 10 mins AI allowed
Outcomes assessed: LO3 LO4 LO5 LO6
Written work group assignment Experimental Lab: Final Report
Experimental lab report
8% Week 13
Due date: 09 Nov 2025 at 23:59

Closing date: 19 Nov 2025
4 pages (+references and reflection) AI allowed
Outcomes assessed: LO3 LO4 LO5 LO6
Practical skill Experimental Lab: Logbook
Assessment of work within lab and weekly log book. Does not include week 3, as this is listed separately, as the early feedback task.
12.6% Weekly 3 hours AI allowed
Outcomes assessed: LO3 LO4 LO5 LO6
Contribution Tutorial and lecture attendance
tutorial and lecture in person attendance.
5% Weekly 2hr per week minimum. AI allowed
Outcomes assessed: LO1 LO2 LO4 LO5 LO6
hurdle task = hurdle task ?
group assignment = group assignment ?
early feedback task = early feedback task ?

Early feedback task

This unit includes an early feedback task, designed to give you feedback prior to the census date for this unit. Details are provided in the Canvas site and your result will be recorded in your Marks page. It is important that you actively engage with this task so that the University can support you to be successful in this unit.

Assessment summary

  • Final examination: the final examination is closed book worth 45%.  It consists of two parts: Section A is on special relativity and is worth 22.5%; and section B is on cosmology and is worth 22.5%. Lists of physical constants and formulas needed are provided in the paper. The final exam is hurdle task, so failure to reach a pass mark in the exam will lead to a failure of the unit.
  • Special relativity assignments: these will be completed in MasteringPhysics via Canvas.
  • Cosmology in-class quiz: a short written test (30mins) taken during a lecture in week 12.
  • Tutorial and lecture attendance: in-person attendence is required at tutorials and lectures.  A minimum attendance of 65% (approx 2 out of 3 hours per week) is required to obtain a full attendance marks. 
  • Experimental physics: The components of assessment for experimental physics labs are based on completing three experiments, that each take several weeks. Assessment is based on the standard to which those experiments are performed and recorded, including via weekly logbook submissions and short written summaries for each experiment.  Students will complete a written report and oral presentation on one experiment.

Final exam: If a second replacement exam is required, this exam may be delivered via an alternative assessment method, such as a viva voce (oral exam). The alternative assessment will meet the same learning outcomes as the original exam. The format of the alternative assessment will be determined by the unit coordinator.

Detailed information for each assessment can be found on Canvas.

Assessment criteria

The University awards common result grades, set out in the Coursework Policy 2014 (Schedule 1).

As a general guide, a high distinction indicates work of an exceptional standard, a distinction a very high standard, a credit a good standard, and a pass an acceptable standard.

Result name

Mark range

Description

High distinction

85 - 100

At HD level, a student demonstrates a flair for the subject and comprehensive knowledge and understanding of the unit material. A ‘High Distinction’ reflects exceptional achievement and is awarded to a student who demonstrates the ability to apply subject knowledge to novel situations.

Distinction

75 - 84

At DI level, a student demonstrates an aptitude for the subject and a solid knowledge and understanding of the unit material. A ‘Distinction’ reflects excellent achievement and is awarded to a student who demonstrates an ability to apply the key ideas of the subject.

Credit

65 - 74

At CR level, a student demonstrates a good command and knowledge of the unit material. A ‘Credit’ reflects solid achievement and is awarded to a student who has a broad understanding of the unit material but has not fully developed the ability to apply the key ideas of the subject.

Pass

50 - 64

At PS level, a student demonstrates proficiency in the unit material. A ‘Pass’ reflects satisfactory achievement and is awarded to a student who has threshold knowledge of the subject.

Fail

0 - 49

When you don’t meet the learning outcomes of the unit to a satisfactory standard.

For more information see sydney.edu.au/students/guide-to-grades.

For more information see guide to grades.

Use of generative artificial intelligence (AI)

You can use generative AI tools for open assessments. Restrictions on AI use apply to secure, supervised assessments used to confirm if students have met specific learning outcomes.

Refer to the assessment table above to see if AI is allowed, for assessments in this unit and check Canvas for full instructions on assessment tasks and AI use.

If you use AI, you must always acknowledge it. Misusing AI may lead to a breach of the Academic Integrity Policy.

Visit the Current Students website for more information on AI in assessments, including details on how to acknowledge its use.

Late submission

In accordance with University policy, these penalties apply when written work is submitted after 11:59pm on the due date:

  • Deduction of 5% of the maximum mark for each calendar day after the due date.
  • After ten calendar days late, a mark of zero will be awarded.

Academic integrity

The University expects students to act ethically and honestly and will treat all allegations of academic integrity breaches seriously.

Our website provides information on academic integrity and the resources available to all students. This includes advice on how to avoid common breaches of academic integrity. Ensure that you have completed the Academic Honesty Education Module (AHEM) which is mandatory for all commencing coursework students

Penalties for serious breaches can significantly impact your studies and your career after graduation. It is important that you speak with your unit coordinator if you need help with completing assessments.

Visit the Current Students website for more information on AI in assessments, including details on how to acknowledge its use.

Simple extensions

If you encounter a problem submitting your work on time, you may be able to apply for an extension of five calendar days through a simple extension.  The application process will be different depending on the type of assessment and extensions cannot be granted for some assessment types like exams.

Special consideration

If exceptional circumstances mean you can’t complete an assessment, you need consideration for a longer period of time, or if you have essential commitments which impact your performance in an assessment, you may be eligible for special consideration or special arrangements.

Special consideration applications will not be affected by a simple extension application.

Using AI responsibly

Co-created with students, AI in Education includes lots of helpful examples of how students use generative AI tools to support their learning. It explains how generative AI works, the different tools available and how to use them responsibly and productively.

Support for students

The Support for Students Policy reflects the University’s commitment to supporting students in their academic journey and making the University safe for students. It is important that you read and understand this policy so that you are familiar with the range of support services available to you and understand how to engage with them.

The University uses email as its primary source of communication with students who need support under the Support for Students Policy. Make sure you check your University email regularly and respond to any communications received from the University.

Learning resources and detailed information about weekly assessment and learning activities can be accessed via Canvas. It is essential that you visit your unit of study Canvas site to ensure you are up to date with all of your tasks.

If you are having difficulties completing your studies, or are feeling unsure about your progress, we are here to help. You can access the support services offered by the University at any time:

Support and Services (including health and wellbeing services, financial support and learning support)
Course planning and administration
Meet with an Academic Adviser

WK Topic Learning activity Learning outcomes
Week 01 Special relativity Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Lab Introduction and experiment booking Practical (3 hr) LO3 LO4 LO6 LO5
Week 02 Special relativity Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Special relativity Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 03 Special relativity Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Special relativity Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 04 Special relativity Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Special relativity Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 05 Special relativity Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Special relativity Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 06 Special relativity Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Special relativity Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 07 Cosmology Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Special relativity Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 08 Cosmology Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Cosmology Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 09 Cosmology Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Cosmology Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 10 Cosmology Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Cosmology Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 11 Cosmology Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Cosmology Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 12 Cosmology Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Cosmology Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5
Laboratory experiments Practical (3 hr) LO3 LO4 LO6 LO5
Week 13 Cosmology Lecture (2 hr) LO1 LO2 LO4 LO6 LO5
Cosmology Tutorial (1 hr) LO1 LO2 LO4 LO6 LO5

Attendance and class requirements

In person attendance is required for both tutorials and lectures. This contributes to 5% of the overall unit mark. Each week there are 2 hours of lectures and 1 hour of tutorials. Students will achieve full marks for attendance with a minimum of 65% in-person attendance (2 out of 3 hours per week).

Study commitment

Typically, there is a minimum expectation of 1.5-2 hours of student effort per week per credit point for units of study offered over a full semester. For a 6 credit point unit, this equates to roughly 120-150 hours of student effort in total.

Learning outcomes are what students know, understand and are able to do on completion of a unit of study. They are aligned with the University's graduate qualities and are assessed as part of the curriculum.

At the completion of this unit, you should be able to:

  • LO1. understand key concepts in special relativity and cosmology
  • LO2. apply these concepts to develop models, and to solve qualitative and quantitative problems in scientific and engineering contexts, using appropriate mathematical and computing techniques as necessary
  • LO3. understand the nature of scientific measurement, and skills in the measurement of physical quantities and the handling of data
  • LO4. find and analyse information and judge its reliability and significance
  • LO5. demonstrate a sense of responsibility, ethical behaviour and independence as a learner and as a scientist.
  • LO6. communicate scientific information appropriately, both orally and through written work

Graduate qualities

The graduate qualities are the qualities and skills that all University of Sydney graduates must demonstrate on successful completion of an award course. As a future Sydney graduate, the set of qualities have been designed to equip you for the contemporary world.

GQ1 Depth of disciplinary expertise

Deep disciplinary expertise is the ability to integrate and rigorously apply knowledge, understanding and skills of a recognised discipline defined by scholarly activity, as well as familiarity with evolving practice of the discipline.

GQ2 Critical thinking and problem solving

Critical thinking and problem solving are the questioning of ideas, evidence and assumptions in order to propose and evaluate hypotheses or alternative arguments before formulating a conclusion or a solution to an identified problem.

GQ3 Oral and written communication

Effective communication, in both oral and written form, is the clear exchange of meaning in a manner that is appropriate to audience and context.

GQ4 Information and digital literacy

Information and digital literacy is the ability to locate, interpret, evaluate, manage, adapt, integrate, create and convey information using appropriate resources, tools and strategies.

GQ5 Inventiveness

Generating novel ideas and solutions.

GQ6 Cultural competence

Cultural Competence is the ability to actively, ethically, respectfully, and successfully engage across and between cultures. In the Australian context, this includes and celebrates Aboriginal and Torres Strait Islander cultures, knowledge systems, and a mature understanding of contemporary issues.

GQ7 Interdisciplinary effectiveness

Interdisciplinary effectiveness is the integration and synthesis of multiple viewpoints and practices, working effectively across disciplinary boundaries.

GQ8 Integrated professional, ethical, and personal identity

An integrated professional, ethical and personal identity is understanding the interaction between one’s personal and professional selves in an ethical context.

GQ9 Influence

Engaging others in a process, idea or vision.

Outcome map

Learning outcomes Graduate qualities
GQ1 GQ2 GQ3 GQ4 GQ5 GQ6 GQ7 GQ8 GQ9

This section outlines changes made to this unit following staff and student reviews.

Since the last version of this unit, tutorials have been added, with a reduction in the number of other assessments. Assessment weights have been modified, including making the final exam a hurdle task.

RELATIVITY

Concepts of classical relativity, special relativity, Einstein’s two
postulates, relative motion, twin paradox, Doppler shift, Lorentz
transformations, spacetime and causality, relativistic momentum,
relativistic kinetic energy, mass as a measure of energy.

 

COSMOLOGY

The cosmological principle, the Friedmann equations, the
Friedmann-Robertson-Walker metric, cosmological redshift, the
cosmic microwave background radiation.

Work, health and safety

We are governed by the Work Health and Safety Act 2011, Work Health and Safety Regulation 2011 and Codes of Practice. Penalties for non-compliance have increased. Everyone has a responsibility for health and safety at work. The University’s Work Health and Safety policy explains the responsibilities and expectations of workers and others, and the procedures for managing WHS risks associated with University activities. 

General Laboratory Safety Rules

  • No eating or drinking is allowed in any laboratory under any circumstances
  • A laboratory coat and closed-toe shoes are mandatory
  • Follow safety instructions in your manual and posted in laboratories
  • In case of fire, follow instructions posted outside the laboratory door
  • First aid kits, eye wash and fire extinguishers are located in or immediately outside each laboratory

As a precautionary measure, it is recommended that you have a current tetanus immunisation. This can be obtained from University Health Service: unihealth.usyd.edu.au/

Disclaimer

The University reserves the right to amend units of study or no longer offer certain units, including where there are low enrolment numbers.

To help you understand common terms that we use at the University, we offer an online glossary.