(a)[1]
State the law of Wien’s displacement.
(b(i))[2]
Determine the surface temperature for star B.
(b)
Fig. 10.1 shows the wavelength distributions of electromagnetic radiation emitted by two stars A and B. The surface temperature of star A is known to be $5800\\,\\text{K}$.
(b(ii))[2]
Star B is less bright than star A when seen from the Earth. Use Fig. 10.1 to suggest, with a reason, how the physical appearance of star B differs from that of star A.
(c(i))[2]
The lines in Fig. 10.1 have been adjusted for redshift. State what is meant by redshift.
(c(ii))[2]
Explain how cosmologists are able to determine that light from a distant star has undergone redshift.