Learn about how waves are measured according to amplitude, wavelength and frequency.

What is the name for the distance from peak to peak of a wave?

Wavelength

Amplitude

Frequency

What is the general name for waves that require a medium to vibrate?

Electromagnetic

Mechanical

Transverse

What is the unit for time period?

Metres (m)

Hertz (Hz)

Seconds (s)

What is the time period of a 40 Hz wave?

0.025 s

0.4 s

40 s

What is the frequency of a wave with a time period of 0.08 s?

8 Hz

1.25 Hz

12.5 Hz

How is wave speed calculated?

Wave speed = frequency ÷ wavelength

Wave speed = frequency × wavelength

Wave speed = wavelength ÷ frequency

What is the wave speed of a 1000 Hz wave with a wavelength of 0.04 m?

40 m/s

400 m/s

0.00004 m/s

A boat at sea bobs up and down as waves pass. The vertical distance between a crest and a trough is 62 cm and 20 waves pass the boat in 30 seconds. What is the amplitude of the waves?

20 cm

31 cm

62 cm

A boat at sea bobs up and down as waves pass. The vertical distance between a crest and a trough is 52 cm and 20 waves pass the boat in 10 seconds. What is the frequency of the waves?

0.5 Hz

2 Hz

200 Hz

What is the wavelength of a BBC Radio 1 wave that has a frequency of 99.7 MHz and speed of 300,000,000 m/s (3 x 10^{8} m/s)?

3 m

3,000,000 m

2.9 x 10^{16} m