General Wave Properties

Question 1

Waves

Answer 1

A periodic motion travelling disturbance repeated at regular intervals, which transfer energy from one point to another without any transfer of matter.

Question 2

Oscillation

Answer 2

A complete to-and-fro motion from one extreme position to the other extreme position, and back.

Question 3

Crest

Answer 3

The highest point of a transverse wave

Question 4

Trough

Answer 4

The lowest point of a transverse wave

Question 5

Wavefront

Answer 5

An imaginary line joining all points on the waves that are in phase.

Question 6

Any two points are in phase when they

Answer 6

1. move in the same direction
2. have the same speed and displacement from their rest position

Question 6

Any two points are in phase when they

Answer 6

1. move in the same direction
2. have the same speed and displacement from their rest position

Question 7

Wavelength

Answer 7

The shortest distance between 2 points in phase on a wave.

Question 8

Amplitude

Answer 8

The maximum displacement of a particle from the rest position in a wave.

Question 9

Period

Answer 9

The time taken for one complete oscillation.

Question 10

Frequency

Answer 10

Number of complete oscillations per unit time

Question 11

Transverse wave

Answer 11

A wave where the direction of vibration of the particles is perpendicular to the direction of propagation of the wave.

Question 12

Longitudinal waves

Answer 12

A wave where the direction of vibration of the particles is parallel to the direction of propagation of the wave.

Question 13

Compression

Answer 13

Places in the longitudinal wave where air pressure is slightly high than the surrounding air pressure.

Question 14

Rarefaction

Answer 14

Places in the longitudinal wave where air pressure is slightly lower than the surronding air pressure.

Question 15

Water waves travelling from deep to shallow water…

Answer 15

slows down. The wavelength of the plane waves shortens as they travel from deep to shallow water, the frequency remains unchanged as it is determined by the dipper. Using v = fλ, the speed of waves is lower at the shallow water.