4.3 Wave properties 1

Question 1

Define wavefronts

Answer 1

lines of constant phase e.g wave crests

Question 2

Define refraction

Answer 2

change of direction of a wave when it crosses a boundary where its speed changes.

Question 3

Define diffraction

Answer 3

the spreading of waves when they pass through a gap or round an obstacle.

Question 4

What are 2 factors that affect diffraction/movement of waves in diffraction?

Answer 4

1. The narrower the gap, the more the waves spread out

2. The longer the wavelength, the more the waves spread out