Waves

Question 0

What is the ‘wavelength’ ?

Answer 0

The wavelength is the length of a full cycle of the wave, E.g. from Crest to Crest.

Question 1

What is the ‘amplitude’ ?

Answer 1

The amplitude is the displacement from the rest position to the crest (not from a trough to a crest)

Question 2

What is the frequency?

Answer 2

Frequency is the number of complete waves passing a certain point per second or the number of waves produced by a source each second. Frequency is measured in hertz (Hz).one Hz is one wave per second.

Question 3

What type of vibrations do transverse waves have?

Answer 3

Sideways

Question 4

List four points of transverse waves

Answer 4

Most ways are transverse:

1) light and all other EM waves
2) ripples on water
3) waves on strings
4) a slinky spring wiggled up and down

Question 5

Direction and transverse waves

Answer 5

In transverse waves the vibrations are perpendicular (at 90°) to the direction of energy transfer of the wave.

Question 6

What type of vibrations do longitudinal waves have ?

Answer 6

Along the same line

Question 7

Three points on longitudinal waves

Answer 7

examples of longitudinal waves are:

1) Soundwaves and ultrasound
2) shockwaves e.g.seismic waves
3) A slinky spring when you push the end

Question 8

Direction of a longitudinal wave

Answer 8

In Longitudinal waves the vibrations are parallel to the direction of energy transfer of the wave.

Question 9

Water waves ,shockwaves and waves in springs and ropes are examples of what?

Answer 9

Mechanical waves

Question 10

The equation of wave speed

Answer 10

Wave speed = frequency x wavelength

Question 11

Units of - speed = frequency x wavelength

Answer 11

m/s = Hz x m

Question 12

Letter equation

Answer 12

v = f x λ
V = velocity for speed
f= Frequency
λ=wavelength