Paper 1 H - SAMPLE SET 1 Q3
(3) (a) Figure 2 shows some lines in the absorption spectra from four different galaxies
(A, B, C, and D) and from a laboratory source.
All the spectra are aligned and to the same scale.
All the spectra are aligned and to the same scale.
(i) Explain, using Figure 2, which galaxy is furthest away from us.
(3)
(ii) In Figure 2, the reference wavelength, λ0, is shown at 390 nm.
Estimate the change in the reference wavelength, ∆λ, for the light from galaxy D. (1)
(ii) In Figure 2, the reference wavelength, λ0, is shown at 390 nm.
Estimate the change in the reference wavelength, ∆λ, for the light from galaxy D. (1)
∆λ = ..................................................... nm
(iii) Calculate the speed, v, of galaxy D.
Use the equation
[c = speed of light = 3 × 108
m/s]
(2)
v = ..................................................... m/s
(b) Figure 3 shows a photograph of galaxy D.
This photograph was taken by a student at his home.
State two ways that the student can improve the observational techniques so
that the quality of the image is improved.
(2)
1 ...........................................................................................................................................................
2 ..........................................................................................................................................................
(Total for Question 3 = 8 marks)
1 ...........................................................................................................................................................
2 ..........................................................................................................................................................
(Total for Question 3 = 8 marks)