(a)[1]
State Wien’s displacement law in words.
(b(i))[2]
Fig. 10.1 gives the wavelength distributions of electromagnetic radiation from stars A and B. The surface temperature of star A is $5800\,\text{K}$. Find the surface temperature of star B.
(b(ii))[2]
Star B looks less bright than star A when seen from 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 already been corrected for redshift. State what redshift means.
(c(ii))[2]
Explain how cosmologists can tell that light from a distant star has experienced redshift.