waves

Question 1

period

Answer 1

time taken for 1 oscillation

Question 2

wavelength

Answer 2

minimum distance moved between 2 wavefronts

Question 3

transverse wave

Answer 3

vibration of particle is perpendicular to the direction of propagation of energy

Question 4

longitudinal wave

Answer 4

vibration of particle is parallel to the direction of propagation of energy

Question 5

progressive wave

Answer 5

propagation of energy as a result of oscillation

Question 6

displacement

Answer 6

distance of point on wave from equilibrium position

Question 7

amplitude

Answer 7

max displacement

Question 8

coherence

Answer 8

constant phase difference between 2 waves

Question 9

frequency

Answer 9

number of oscillations of a point on wave per unit time

Question 10

principle of superposition

Answer 10

when 2 or more waves meet at a point, the resultant displacement is the vector sum of the displacement of individual wave

Question 11

diffraction

Answer 11

spreading of waves when passing through the obstacle

Question 12

interference

Answer 12

overlapping of waves with the same frequency, speed, wavelength but opposite in direction.

Question 13

superposition

Answer 13

constant phase difference between each of the waves

Question 14

doppler effect

Answer 14

change in observed frequency when the source is moving relative to the observer

Question 15

polarisation

Answer 15

vibration of particle in one normal to the direction of propagation of wave

Question 16

speed of progressive wave

Answer 16

speed at which energy is transferred

Question 17

node

Answer 17

zero amplitude