DP Physics (last assessment 2024)

Question 17N.3.SL.TZ0.13b

Date	November 2017	Marks available	[Maximum mark: 2]	Reference code	17N.3.SL.TZ0.13b
Level	SL	Paper	3	Time zone	TZ0
Command term	Determine	Question number	b	Adapted from	N/A

[Maximum mark: 2]

17N.3.SL.TZ0.13b

The collision of two galaxies is being studied. The wavelength of a particular spectral line from the galaxy measured from Earth is 116.04 nm. The spectral line when measured from a source on Earth is 115.00 nm.

(b)

Determine the velocity of the galaxy relative to Earth.

[2]

Markscheme

« $\frac{{\Delta \lambda }}{\lambda } =$ » $\frac{{1.04}}{{115}} = \frac{v}{c}$

0.009c

Accept 2.7×10⁶ «m s^–1»

Award [0] if 116 is used for $\lambda$

Syllabus sections

Option D: Astrophysics

Option D: Astrophysics » Option D: Astrophysics (Core topics) » D.3 – Cosmology

Option D: Astrophysics » Option D: Astrophysics (Core topics)

Question 17N.3.SL.TZ0.13b

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