GCSE Questions - Electromagnetic Spectrum

Q4. A laser emits light waves in the visible region of the electromagnetic spectrum.

(a) What type of wave are all electromagnetic waves?

[1 mark]

(b) The light from a laser has a wavelength of 6.5 x 10-7 m The speed of light is 3.0 x 108 m/s

Calculate the frequency of the light from the laser. Give your answer to 2 significant figures.

[4 marks]

(c) What is the approximate range of wavelengths of the electromagnetic spectrum? Tick one box.

Range of wavelengths in metres
10-10 to 108
10-8 to 106
10-15 to 104

[1 mark]

(Total 6 marks)