Waves in Two Dimensions

Question 1

2D waves can come from either a point source or a straight ____ source.

Answer 1

Line

Question 2

When waves in 2D are from a point source, they are DIVERGING which means what?

Answer 2

they spread out as the wave moves

Question 3

When waves in 2D are diverging, it causes the waves to ____ energy the further away from the point source they go

Answer 3

lose

Question 4

Waves in any liquid cause a ________ motion of the molecules on the surface.

Answer 4

circular

Question 5

When a wave strikes a solid boundary, it will be __________ by the boundary

Answer 5

reflected

Question 6

when a _____ source wave strikes a barrier, it is reflected back in a way that looks like the wave is coming from behind the barrier

Answer 6

point

Question 7

Waves travelling in one medium will have a ________ frequency, wavelength and speed.

Answer 7

constant

Question 8

If the wave changes medium, the _____ and __________ of the wave will change while the FREQUENCY remains unchanged

Answer 8

speed and wavelength!

Question 9

what is the refraction formula?

Answer 9

V1/λ1 = V2/λ2

Question 10

Are waves summative?

Answer 10

YES

Question 11

Waves combine either ______________ or _____________

Answer 11

constructive or destructive

Question 12

When crests meet crests and troughs meet troughs, ____________ interference occurs

Answer 12

constructive

Question 13

When crests meet crests and troughs meet troughs (constructive interference), what are they called?

Answer 13

antinodes or maxima

Question 14

When crests meet troughs, complete destructive interference occurs and these are called what?

Answer 14

nodes or minima