P4 PROPERTIES OF WAVES, INCLUDING LIGHT AND SOUND

Question 1

How the vibrations travel in a longitudinal wave?

Answer 1

The wave travel by vibrations IN DIRECTION of travel of the wave.

Question 2

How the vibrations travel in a transverse wave?

Answer 2

The wave travel by vibrations AT RIGHT ANGLE TO THE DIRECTION of travel of the wave.

Question 3

Wavelength of a wave is…………

Answer 3

the DISTANCE between consecutive PEAKS or TROUGHS of the wave.

Question 4

the frequency of a wave is…………

Answer 4

the NUMBER of PEAKS / TROUGHS that past each SECOND. ( the pitch)

Question 5

the amplitude of a wave is…………

Answer 5

the SIZE of the VIBRATIONS ( the loudness)

Question 6

how far does a wave with speed 5 m/s travel in 3s?

Answer 6

5 m/s x 3s = 15 m

Question 7

all waves transfer………..

Answer 7

energy

Question 8

wave speed equation is………….

Answer 8

v = f x /\

wave speed = frequency x wavelength

Question 9

A wave changes direction as it moves from one medium to another.
What effects the amount of change and direction?

Answer 9

the DENSITY of each medium.

Question 10

Reflection of light at the surface of a pond can make the pond look shallower than it really is. Explain why.

Answer 10

The light from the bottom of the pond is REFRACTED AWAY from the normal as it LEAVE the pond, so it enters your eye at a shallower angle.