Question 5
FThe Figure shows how the intensity of the radiation emitted by two stars, P and Q, changes with wavelength.
Figure
a.[2]
Which star, P or Q, has the higher surface temperature?
Give a reason for your answer.
b.[1]
Use the Figure to determine the wavelength at which star Q emits its most intense radiation.
c.[2]
A student says:
'Only very hot objects, such as stars, emit radiation.'
Explain why the student is wrong.
8.3 Beyond Earth Questions
50 exam-style questions on OCR GCSE Physics 8.3 Beyond Earth, covering 8.3.1 Red-shift and the expanding universe, 8.3.2 Evidence for the Big Bang model, 8.3.3 Formation of the Sun and stellar equilibrium, 8.3.4 Radiation emitted by hot bodies, 8.3.5 The solar system and satellites, 8.3.6 Gravity and circular orbits, 8.3.7 Orbital radius and orbital speed, 8.3.8 Radiation balance and the temperature of the Earth, and 8.3.9 Seismic waves and exploring hidden structures. Each one has a worked solution and a mark scheme showing where the marks go.