(a) The wavelengths of four different types of electromagnetic wave, including visible light waves, are given in the table.

Which of the waves, A, B or C, is an infra red wave?

..............................
(1 mark)

(b) A TV station broadcasts at 500 000 kHz. The waves travel through the air at 300 000 000 m/s.

Use an appropriate equation to calculate the wavelength of the waves broadcast by this station.

Show clearly how you work out your answer.

Wavelength = ........................... m
(2 mark)

(c) What happens when a metal aerial absorbs radio waves?

(2 marks)

(d) Stars emit all types of electromagnetic waves. Telescopes that monitor X-rays are mounted on satellites in space.

Why would an X-ray telescope based on Earth not be able to detect X-rays emitted from distant stars?

(1 mark)

How did you do? Click to show the mark scheme

From Q5 P1 AQA January 2008