GCSE Questions - Waves

Q17. The diagram shows Kayjay playing with a remote-controlled car.

(a) The remote control transmits radio waves to the car aerial.

The transmitted radio waves have a frequency of 320 MHz.

Given that the speed of light is 3.0 × 10⁸ m/s, calculate the wavelength of the radio waves.

[5 marks]

(b) The car aerial is connected to an electrical circuit in the car.

Describe what happens in the electrical circuit when the car aerial absorbs radio waves.

[2 marks]

Give two ways in which radio waves are different to sound waves.

[2 marks]

(Total 9 marks)