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Question 18N.3.HL.TZ0.a

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.3.HL.TZ0.a
Level HL Paper 3 Time zone TZ0
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 2]
18N.3.HL.TZ0.a

The graph shows the variation with distance from the Earth of the recessional velocities of distant galaxies.

Outline how Hubble measured the recessional velocities of galaxies.

[2]

Markscheme

measured redshift «z» of star ✔

use of Doppler formula OR z∼v/c OR v =  c Δ λ λ to find v ✔

 

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