waves

Question 1

what is the amplitude of a wave?

Answer 1

the maxiumum displacment of a point on a wave away from its undisturb position

Question 2

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what is the wavlegth of a wave?

Answer 2

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

Question 3

what is the frequency of a wave?

Answer 3

number of waves passing a point each second

Question 4

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Question 5

what is the period of a wave?

Answer 5

amount of time it takes for a full cycle of a wave to passs a point

Question 6

what is the equation for a a period?

Answer 6

period = 1/frequency

period is measued in seconds , frequency meaured in hertz

Question 7

what is the wave speed?

Answer 7

the speed at which the energy is transfered through a medium

Question 8

equation for wavespeed?

Answer 8

wavespeed = frequency x wavelength

Question 9

describe transverse waves?

Answer 9

the oscillation are perpendicualr to the direction of energy transfer

sqwiggle line ~~~~

Question 10

describe a longitudinal wave?

Answer 10

oscillations are parallel to the direction of energy transfere

Question 11

give some examples of transverse waves

Answer 11

• electromagnetic waves
• ripple and waves in water
• a wave on a srting

Question 12

give some examples of a longitudinal wave

Answer 12

• sound wave
• showck waves

Question 13

decribe hpw you can meausre the speed of soundwaves in air

Answer 13

1. set oscilloscope so detected waves at each miscrophone are shown as seperate waves
2. put both microphones next to the speaker , slwoly move one away until 2 waves are aligned on display but are one wavelentgh apart
3. meaure distance between microphone for wavelength
4. use formula wavespeed= wavelength x fequency
5. frequency found on signal generator

Question 14

what is the practical to meausre speed of water ripples?

Answer 14

1. have a shallow tray of water and place a vibrating bar inside
2. bar is connected to power pack and waves are created on surface of water
3. above the dank add a lamp and dim it and below add a white peice of paper
4. light will shine through water producing a image of the waves
5. place a ruler next to the waves and use mobile phone to take a picture and freeze it
6. meaure distcnace betweeen 1 to 10 waves and then divide by 10 = wavelength
7. frequency= place time next to peice of paper then cound number of waves in 10 seconds and divide by 10
8. use formula