waves

Question 1

what do waves do

Answer 1

waves transfer energy from one place to another

Question 2

what are two types of waves

Answer 2

longitudinal
transverse

Question 3

what are oscillations

Answer 3

up and down movement of waves

Question 4

what type of wave is a sound wave

Answer 4

longitudinal

Question 5

what type of wave is a ripple wave

Answer 5

transverse

Question 6

what is the direction of energy transfer in transverse

Answer 6

oscillations perpendicular to the direction of energy transfer
energy transfer sideways

Question 7

what is the direction of energy transfer in longitudinal

Answer 7

oscillations parallel to direction of energy transfer

Question 8

what do longitudinal waves require that not all transverse waves do

Answer 8

a medium to travel through

Question 9

what are compressions

Answer 9

in a l.wave, compressions are regions where air particles are very close together

Question 10

what are rarefactions

Answer 10

in a l.wave, rarefactions are regions are where air particles are spread out

Question 11

what is the only thing travelling

Answer 11

the wave not the medium

Question 12

what is amplitude

Answer 12

furthest point the wave vibratees from its undisturbed position

Question 13

what is wavelength

Answer 13

distance from a point on one wave to the equivalent point on the adjacent wave

Question 14

how do you measure wavelength on a longitudinal wave

Answer 14

from one compression to another or one rarefaction to another

Question 15

what is frequency

Answer 15

number of waves passing a point each second

Question 16

what is frequency units

Answer 16

hertz- Hz

Question 17

what is frequency equation (2 ways)

Answer 17

1/T or V/lambda

Question 18

what is period and its equation

Answer 18

time in seconds for 1 wave to pass a point
period=1/f

Question 19

what is wavespeed
2 ways

Answer 19

speed at which the wave moves through the medium or speed at which energy is transferred

Question 20

what is wavespeed equation

Answer 20

v=fxwavelength

Question 21

what is rarefaction of waves

Answer 21

waves can change direction when they change speed - moving from one medium to another

Question 22

what happens when light passes from air into glass

Answer 22

the velocity of light decreases causing the direction of the waves to change

Question 23

what happens when waves pass from the glass back to the air

Answer 23

their velocity increases causing the image to appear as shifted position

Question 24

when can rarefaction happen

Answer 24

when any waves change speed as it passes from one medium to another

Question 25

what is the exception to the rarefaction rule

Answer 25

if waves enter or leave the medium at right angles to the surface they do not change direction