electromagnetic waves

Question 1

what type of waves are electromagnetic waves

Answer 1

transverse waves

Question 2

all electromagnetic waves have the same what?

Answer 2

velocity speed in air or a vacuum

Question 3

how does the wavelength of an electromagnetic wave affect the way it is ….

Answer 3

absorbed, transmitted, reflected or refracted by different substances which affects its uses

Question 4

what is refraction

Answer 4

when a wave passes from one medium into another

Question 5

what does the direction of refraction depend on

Answer 5

• the angle at which the wave hits the boundary

- materials involved

Question 6

for light rays, the way in which a material affects refraction is called?

Answer 6

it’s refractive index

Question 7

when light travels:

Answer 7

-from a material with a low refractive index to one with a higher refractive
index, it bends towards the normal
-from a material with a high refractive index to one with a lower refractive index, it bends away from the normal

Question 8

what is refraction due to

Answer 8

difference in wave speed in different media

Question 9

when a light wave enters, at an angle, a medium in which it travels slower:

Answer 9

• first part of light wave slows down
• rest of wave continues at the higher speed
• causes wave to change direction, towards normal