Topic 3 - Wave Behaviour and EM Waves

Question 1

what are wavefronts?

Answer 1

imaginary planes that cut across all the waves, connecting the points on adjacent waves that are vibrating together

Question 2

what is the distance between each wavefront equal to?

Answer 2

one wavelength

Question 3

what is the frequency and wavelength of a wave moving towards you?

Answer 3

the frequency is higher, the wavelength is shorter

Question 4

what is the frequency and wavelength of a wave moving away from you?

Answer 4

the frequency is lower, the wavelength is longer

Question 5

what are the seven types of EM waves (in order of increasing frequency)

Answer 5

radio, micro, infrared, visible light, UV, x-rays, gamma

Question 6

what is the difference in frequency and wavelength between a gamma ray and a radio wave?

Answer 6

gamma ray has a higher frequency but a lower wavelength

Question 7

do EM waves travel at the same speed?

Answer 7

yes, through a vacuum

Question 8

what do colours of visible light depend on?

Answer 8

the wavelenth

Question 9

which colour has the longest wavelength?

Answer 9

red