Waves

Question 1

Transverse wave

Answer 1

Particle oscillations are perpendicular to direction of wave

Question 2

Crests

Answer 2

Points with maximum vertical displacement above horizontal

Question 3

Troughs

Answer 3

Points with maximum vertical displacement below horizontal

Question 4

Wavelength

Answer 4

Length of one wave, distance between 2 adjacent Crests (or troughs)

Question 5

Amplitude

Answer 5

Maximum displacement from horizontal equilibrium position

Question 6

Period

Answer 6

Time for one complete vertical oscillation

Question 7

Frequency

Answer 7

Number of cycles wave completes in 1 second

Question 8

Wave Rule #1

Answer 8

All waves of same type in same medium have the same speed

Question 9

Wave Rule #2

Answer 9

When a wave passes into a new medium, its frequency stays the same

Question 10

Constructive interference

Answer 10

If 2 waves have displacement of same sign when they overlap, the combined wave will have a displacement of greater magnitude than either individual wave

Question 11

Destructive interference

Answer 11

If waves have opposite displacements when they meet, the combined waveform will have a displacement of smaller magnitude than either individual wave

Question 12

In phase

Answer 12

If crest meets crest & trough meets trough, waves will constructively interfere
Amplitude of combined wave will be sum of individual amplitudes

Question 13

Out of phase

Answer 13

If crests meets trough & trough meets crest, waves will destructively interfere
Amplitude of combined wave will be the difference between individual amplitudes

Question 14

Standing wave

Answer 14

When 2 oppositely traveling waves that have same f, A & y oscillate vertically & remain fixed

Question 15

Nodes

Answer 15

Points where 2 traveling waves destructively interfere

Question 16

Antibodies

Answer 16

Points where 2 traveling waves constructively interfere

Question 17

Sound waves

Answer 17

Produced by vibration of an object, vibrations cause pressure variations in conducting medium

Question 18

Compressions

Answer 18

Where molecules are bunched together (pressure is above normal)

Question 19

Rarefactions

Answer 19

Positions where pressure is below normal

Question 20

Longitudinal waves

Answer 20

Particle oscillations are parallel to direction of wave

Question 21

Beat

Answer 21

When 2 sound waves whose frequencies are close but no identical interfere, by superposition, waves interfere constructively, then destructively…

Question 22

Doppler effect

Answer 22

Shift in frequency that occurs when the source & detector are in relative motion