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5.2 The electromagnetic spectrum

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Question 25
H

Infrared cameras can be used to detect areas of inflammation just under the skin.

Which statement explains how?

[1]
A

Inflamed areas are warmer, so they emit more infrared that the camera detects

B

Inflamed areas absorb infrared from the camera, so they appear darker on screen

C

Infrared passes through inflamed areas faster, so it reaches the camera first

D

Inflamed areas reflect visible light, which the camera changes into infrared

Markscheme

5.2 The electromagnetic spectrum Questions

  1. GCSE
  2. /Physics
  3. /5.2 The electromagnetic spectrum

48 exam-style questions on OCR GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves in space, 5.2.2 Energy transfer by electromagnetic waves, 5.2.3 Frequency and wavelength across the spectrum, 5.2.4 Groups of the electromagnetic spectrum, 5.2.5 Visible light and the limits of human sight, 5.2.6 Light as an electromagnetic wave, 5.2.7 Uses of electromagnetic waves, 5.2.8 Hazards of ultraviolet, X-rays and gamma rays, 5.2.9 Ultrasound and imaging inside the body, and 5.2.10 Radio waves and oscillating circuits. Each one has a worked solution and a mark scheme showing where the marks go.

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