General Wave Properties

Question 1

Waves/ Wave Motion

Answer 1

A periodic motion 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 & Trough

Answer 3

Crest: highest point of a tranverse wave

Trough lowest point of a tranverse wave

Question 4

Wavefront

Answer 4

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

Question 5

Phase

Answer 5

Any two points are in phase when they move in the same direction and have the same speed and displacement from the rest position

Question 6

Wavelength

Answer 6

Shortest distance between any two points that are in phase on a wave

Question 7

Amplitude

Answer 7

Maximum displacement of a particle from the rest position in a wave

Question 8

Period

Answer 8

Time taken for one complete oscillation

Question 9

Frequency

Answer 9

Number of complete oscillations per unit time.

f=1/T

Question 10

General Wave Equation

Answer 10

v=f lambda

Question 11

Properties of waves

Answer 11

1. Transfer energy from one point to another without any transfer of matter
2. Undergo reflection and refraction
3. Obey the Wave Equation

Question 12

Transverse Wave

Answer 12

A wave where the direction of the vibration of the particles is perpendicular to the direction of propogation of the wave

Eg: EM waves

Question 13

Longitudinal waves

Answer 13

Wave where the direction of the vibration of the prticles is parallel to the direction of propogation of the wave

Eg: Sound waves

Question 14

When a wave travel from deep to shallow water

Answer 14

The wavelength shortens, since frequency remains unchanged (determined by dipper), the speed will be lower and hence the wave will bend towards the normal.