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5.2 The electromagnetic spectrum

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Question 23
H

Ultrasound is used to produce an image of organs inside the body.

Which statement explains how the image is formed?

[1]
A

Ultrasound is absorbed by each organ, and the organ then emits it back to the probe

B

Ultrasound travels at the same speed in all tissues, so all the echoes return together

C

Ultrasound is partly reflected at each tissue boundary, and echo times give the depths

D

Ultrasound is fully reflected by the skin, and the echo shows the shape of the organs

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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