9702/52/M/J/22: The brightness of some stars varies regularly. These stars are called variable stars. Fig. 2.1 shows the variation of luminosity with time for a variable star. A student determines the period T and mean luminosity L of the star. The student repeats the process for different variable stars.
It is suggested that L and T are related by the equation \(L = SKT^a\) where S is the luminosity of the Sun, and a and K are constants.
Sample solutions for practical Paper 5 variant 2 Question 2 May/June 2022 Cambridge A Level Physics.
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