The Sun is a stable star - AQA - GCSE Physics - Question 2 - 2020 - Paper 1

The equation that links distance, speed, and time is:

$s = v \times t$

or equivalently,

$v = \frac{s}{t}$

or $t = \frac{s}{v}$.

Given the distance from the Sun to the Earth is:

$s = 1.5 \times 10^{11} \text{ m}$

and the speed of light is:

$v = 3.0 \times 10^{8} \text{ m/s}$,

the time taken, $t$, can be calculated using the formula:

$t = \frac{s}{v} = \frac{1.5 \times 10^{11}}{3.0 \times 10^{8}}$

Calculating this gives:

$t = 500 \text{ seconds}$.

The range of wavelengths emitted by a star depends on its temperature. Therefore, tick the box for Temperature.