The diagram represents a radio wave travelling in free space from point A to point B.
The distance from A to B is 0.75 m. Calculate the wavelength of this radio wave.
State the equation linking wave speed, frequency and wavelength.
Calculate the frequency of this radio wave. [speed of radio waves in free space = 3.0 × 108 m/s]
The diagrams show what happens to sound waves and light waves as they pass through an open doorway into a room.
Name the effect shown by the sound waves in Diagram 1.
Suggest why this effect is not noticeably shown by the light waves in Diagram 2.
