Sound Waves MUS

Question 1

what do all waves have in common?

Answer 1

they are caused by oscillations, and transfer energy without transferring matter

Question 2

what is a progressive wave?

Answer 2

a wave that moves energy away from the source

Question 3

what is a periodic oscillation?

Answer 3

a motion that repeats itself over regular time intervals

Question 4

what is the time period?

Answer 4

the time taken to complete one cycle

Question 5

what is the frequency of an oscillation?

Answer 5

the number of cycles per unit of time

Question 6

what is one cycle per second measured in?`

Answer 6

Hz

Question 7

give equation of frequency from the time period of a wave

Answer 7

F= 1/T

Question 8

what is polarisation?

Answer 8

when a wave which was osciallating in multiple planes has been filtered to only oscilate in one.

Question 9

how would you filter all light out

Answer 9

have one filter to reduce the plane to (i.e) vertical, then have another in a different plane. no light will go through

Question 10

why is polarisation proof that EM waves are transverse?

Answer 10

only transverse waves oscillate in planes. longitudinal waves’s forwards and backwards motion wouldn’t be in stopped so light would still show even with filters in all directions