DP Physics (first assessment 2025)

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Question 20N.2.SL.TZ0.a

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.2.SL.TZ0.a
Level SL Paper 2 Time zone TZ0
Command term Define Question number a Adapted from N/A
a.
[Maximum mark: 2]
20N.2.SL.TZ0.a

The astronomical unit (AU) and light year (ly) are convenient measures of distance in astrophysics. Define each unit.

AU:

ly:

[2]

Markscheme

AU: «average» distance from the Earth to the Sun ✓

ly: distance light travels in one year ✓

Syllabus sections