waves

Question 1

Waves transfer energy without transferring…

They’re described as… about a fixed point

Answer 1

matter

oscillations

Question 2

What are transverse waves?

Answer 2

Waves where the points oscillate along its length to vibrate at 90 degrees to direction of energy transfer.

Question 3

What are the properties of transverse waves?

Answer 3

• energy transfer perpendicular to wave motion
• transfer energy but not particles
• can move in solids, surface of liquids & vacuums

Question 4

What are longitudinal waves?

Answer 4

Waves where the points along its length oscillate parallel to direction of energy transfer.

Question 5

What are the properties of longitudinal waves?

Answer 5

• energy transfer in same direction as wave motion
• transfer energy but not particles
• can move in solids, liquids & gases, not in a vacuum

Question 6

What’s the formula for frequency?

Answer 6

F = 1/t

Question 7

What are the 2 formulas for wave speed?

Answer 7

S=D/T

V = f x λ

Question 8

What is the method for measuring waves?

Answer 8

1. set up ripple tank
2. place paper under ripple tank to catch shadows
3. mark 2 lines on paper 15cm apart
4. record waves passing through over 5 seconds with slow mo camera + measure how long each λ is in m
5. calculate wave speed by recording time it takes 1 wave to pass 15cm
6. calculate frequency using v = f x λ

Question 9

When waves move from one substance to another they may be…

Answer 9

transmitted
absorbed
reflected
refracted

Question 10

How does density affect the change of direction in refraction?

Answer 10

• less to more dense (light bends towards the normal)
• more to less dense (light bends away from the normal)
• when passing along normal light doesn’t bend at all

Question 11

Why will waves have a change of speed in refraction?

Answer 11

When a wave hits a different medium the different parts of the wave enter at different times.