IB DP Physics Mock Exam SL Paper 1B Set 4 - 2025 Syllabus
IB DP Physics Mock Exam SL Paper 1B Set 4
Prepare for the IB DP Physics Mock Exam SL Paper 1B Set 4 with our comprehensive mock exam set 4. Test your knowledge and understanding of key concepts with challenging questions covering all essential topics. Identify areas for improvement and boost your confidence for the real exam
Question
(a) The Moon has no atmosphere and orbits the Earth. The diagram shows the Moon with rays of light from the Sun that are incident at 90° to the axis of rotation of the Moon.
(i) A black body is on the Moon’s surface at point A. Show that the maximum temperature that this body can reach is 400 K. Assume that the Earth and the Moon are the same distance from the Sun. [2]
Another black body is on the Moon’s surface at point B.
(ii) Outline, without calculation, why the maximum temperature of the black body at point B is less than at point A. [2]
(b) The albedo of the Earth’s atmosphere is 0.28. Outline why the maximum temperature of a black body on the Earth when the Sun is overhead is less than that at point A on the Moon. [1]
(c) The Moon orbits the Earth in a circular path.
Outline why
(i) a force acts on the Moon. [1]
(ii) this force does no work on the Moon. [1]
Answer/Explanation
Ans:
a i T = \((\frac{1360}{\sigma})^{0.25}\)
a ii energy/Power/Intensity lower at B connection made between energy/power/intensity and temperature of blackbody
b (28%) of sun’s energy is scattered/reflected by earth’s atmosphere
OR
only 72% of incident energy gets absorbed by blackbody
c i gravitational attraction/force/field «of the planet/Moon»
c ii the force/field and the velocity/displacement are at 90° to each other
OR