User interface language: English | Español

Date November 2018 Marks available 2 Reference code 18N.3.HL.TZ0.19
Level Higher level Paper Paper 3 Time zone 0 - no time zone
Command term Outline Question number 19 Adapted from N/A

Question

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]
a.

Use the graph to determine the age of the universe in s.

[3]
b.

Markscheme

measured redshift «z» of star ✔

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

 

OWTTE

a.

use of gradient or any point on the line to obtain any expression for either  H = v d or  t = d v

correct conversion of d to m and v to m/s ✔

= 4.6 × 1017 «s» ✔

b.

Examiners report

[N/A]
a.
[N/A]
b.

Syllabus sections

Option D: Astrophysics » Option D: Astrophysics (Core topics) » D.3 – Cosmology
Show 34 related questions
Option D: Astrophysics » Option D: Astrophysics (Core topics)
Option D: Astrophysics

View options