6.6.2.2 Properties of Electromagnetic Waves 1

Question 1

What may different substances do differently due to the variation with wavelength?

Answer 1

• absorb (EM waves)
• transmit (EM waves)
• refract (EM waves)
• reflect (EM waves)

Question 2

What are some effects in different substances due to?

Answer 2

• difference in velocity of waves in different substances
• e.g. refraction
• e.g. when light enters denser medium, it slows down

Question 3

What happens if EM waves enter a denser material?

Answer 3

• bends towards normal

Question 4

What happens if EM waves enter a less dense material?

Answer 4

• bends away from normal

Question 5

What happens to the speed of a EM wave with a shorter wavelength?

Answer 5

• slows down more than longer wavelength