plumiRadar and measuring distance with light: OCR A‑Level Physics B questions
OCR A-Level Physics B past-paper questions on 5.1.3.1 Radar and measuring distance with light, 2016–2025, with mark schemes and examiner’s reports where available.
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All 9 questions on Radar and measuring distance with light, as a list
- June 2025, Paper 1, Q33 (2 marks): A spacecraft approaches a planet. It uses radar to measure its distance from the planet and its average velocity towards the planet. Radar pulses are sent at in
- June 2023, Paper 1, Q4 (1 mark): An asteroid travelling at a constant velocity is observed. A radar pulse emitted at time t = 0.00 s reflects from the asteroid and is detected at time t = 6.00
- June 2022, Paper 1, Q33 (4 marks): A spacecraft is tracked by radar from Earth. Radar pulses are sent at intervals of precisely 1800.00 s. The time intervals for the signal to travel from the Ear
- November 2021, Paper 1, Q25 (1 mark): The distance from the Earth to an asteroid is measured by sending a radar pulse to the asteroid at a known time and recording the time when the return pulse is
- November 2021, Paper 2, Q7(a) (1 mark): Calculate the distance between the scanner and the layer of fat. velocity of sound in tissue = 1540 m s–1 distance = m [1]
- November 2020, Paper 2, Q2(a) (1 mark): The mirrors are a distance of 0.80 m apart. Calculate this distance in light seconds. distance = light seconds [1]
- June 2017, Paper 1, Q35(a) (2 marks): Use this data to calculate the average velocity of approach of the asteroid relative to Earth. relative velocity = m s–1 [2]
- June 2017, Paper 1, Q35(b) (3 marks): The path of the asteroid is shown in Fig. 36.1. After 24 hours the angular shift in position of the asteroid relative to Earth is 1.8 mrad. path of asteroid ast
- June 2017, Paper 2, Q4(a) (2 marks): It takes 4.5 hours for the radio signal from the spacecraft at Pluto to reach the Earth. Calculate the distance of the spacecraft from Earth when the signal was
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