#5.1.3a(i)
the use of radar-type measurements to determine distances within the solar system; how distance is measured and defined in units of time, assuming the relativistic principle of the invariance of the speed of light
#5.1.3a(ii)
effect of relativistic time dilation using the relativistic factor
\(γ = \dfrac{1}{\sqrt{1 - \dfrac{v^2}{c^2}}} \)
#5.1.3a(iii)
the measurement of relative velocities by radar observation
#5.1.3a(iv)
evidence for a ‘hot big bang’ origin of the universe from cosmological red-shifts (Hubble’s law); cosmological microwave background.
#5.1.3b
Make appropriate use of, by sketching and interpreting:
(i) logarithmic scales of magnitudes of quantities: distance, size, mass, energy, power, brightness.
#5.1.3c(i)
distances and ages of astronomical objects
#5.1.3c(ii)
distances and relative velocities from radar-type measurements.