Physics (AS & A Level) · May / June 2022 · Paper 52 · Question 2
9702
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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. luminosity period time Fig. 2.1 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.
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(c)(iv)[2]
2(d)[3]
2(e)[1]
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