A space probe is in orbit around the Sun.
The intensity of the radiation from the Sun at the probe is 1400 W/m2. The surface of the probe facing the Sun has an area of 2.0 m2. The probe absorbs 70% of the radiation that reaches it.
Calculate the power absorbed by the probe.
Use the equation
power=intensity×area\text{power} = \text{intensity} \times \text{area}power=intensity×area
The temperature of the probe is constant.
State the power emitted by the probe.
Calculate the energy radiated by the probe in 1.0 hour.
Give your answer in standard form, to 2 significant figures.
The probe moves closer to the Sun, where the intensity of the radiation is 2100 W/m2.
Explain what happens to the temperature of the probe.
96 exam-style questions on Edexcel GCSE Physics 5.3 Black body radiation, covering 5.3.1 Emission of radiation and temperature, 5.3.2 Radiation balance and constant temperature, and 5.3.3 The temperature of the Earth. Each one has a worked solution and a mark scheme showing where the marks go.