| Date | May 2013 | Marks available | 2 | Reference code | 13M.3.HL.TZ1.5 |
| Level | Higher level | Paper | Paper 3 | Time zone | Time zone 1 |
| Command term | Calculate | Question number | 5 | Adapted from | N/A |
Question
This question is about red-shift.
The wavelengths of radio signals from galaxy A are found to be red-shifted from the wavelengths that would be observed from sources at rest relative to Earth.
The fractional change in wavelength of the radio signals from galaxy A is 9.4×10–3.
Calculate, in km s–1, the average velocity of galaxy A relative to Earth.
Markscheme
ν =0.0094c;
2800 (km s-1) ;
Examiners report
was very well done.
Syllabus sections
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