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

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

$s = vt$

This can also be rearranged as: $v = \frac{s}{t}$

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

To calculate the time taken for light to travel from the Sun to the Earth, we use the formula: $t = \frac{s}{v}$

where:

• Distance (s) = 1.5 × 10^{11} m
• Speed (v) = 3.0 × 10^{8} m/s

Plugging in the values: $t = \frac{1.5 \times 10^{11}}{3.0 \times 10^{8}}$

Calculating this gives: $t = 500 \text{ seconds}$

The range of wavelengths emitted by a star depends on its temperature. Therefore, you would tick the box beside 'Temperature'.