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5.2 The electromagnetic spectrum

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Question 28
H

Light has a wavelength of 600 nm600\ \mathrm{nm}600 nm in air and 400 nm400\ \mathrm{nm}400 nm in glass. Its speed in air is 3.0 × 108 m/s.

The frequency does not change at the boundary.

What is the speed of the light in the glass?

[1]
A

0.50×108 m/s0.50\times10^8\ \mathrm{m/s}0.50×108 m/s

B

1.5×108 m/s1.5\times10^8\ \mathrm{m/s}1.5×108 m/s

C

4.5×108 m/s4.5\times10^8\ \mathrm{m/s}4.5×108 m/s

D

2.0×108 m/s2.0\times10^8\ \mathrm{m/s}2.0×108 m/s

Markscheme

5.2 The electromagnetic spectrum Questions

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

84 exam-style questions on Edexcel GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves and refraction in glass (core practical), 5.2.2 Groups of the electromagnetic spectrum, 5.2.3 Wavelength-dependent behaviour of EM waves, and 5.2.4 Velocities of EM waves in different substances. Each one has a worked solution and a mark scheme showing where the marks go.

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