Waves and Energy transfer

Question 1

Define the term wave

Answer 1

A regular pattern of vibration that carries energy from one place to another

Question 2

The two types of waves

Answer 2

Transverse and Longitudinal

Question 3

Transverse waves

Answer 3

Vibration of medium is at right angles to wave travel

Question 4

Longitudinal waves

Answer 4

Vibration of medium is in the same direction as wave travel

Question 5

Medium

Answer 5

The material that the wave moves through

Question 6

Examples of longitudinal waves

Answer 6

Sound

Question 7

Examples of transverse wave

Answer 7

Light, water waves, mechanical waves

Question 8

Define frequency

Answer 8

The number of full waves that pass a point in one second. Measured in Hertz (Hz)

Question 9

Define Wavelength

Answer 9

The minimum distance between two peaks on a wave

Question 10

Define Amplitude

Answer 10

The maximum height of a wave measured from the midpoint

Question 11

Which travels faster light or sound?

Answer 11

Light travels much faster than sound

Question 12

We see objects like books, tables etc because

Answer 12

Light rays reflects off them and travel into our eye

Question 13

The law of reflection states…

Answer 13

The angle of incidence is equal to the angle of reflection

Question 14

Define refraction

Answer 14

The bending of a wave when it enters a different substance

Question 15

Why does refraction happen?

Answer 15

The wave speeds up or slows down when it enters a new substance

Question 16

Whit light is a mixture of these colours

Answer 16

Red, Orange, Yellow, Green, Blue, Indigo and Violet

Question 17

When a prism splits light into 7 colours, we call the effect__________

Answer 17

Dispersion

Question 18

A green book looks green because……..

Answer 18

It reflects green light and absorbs all other colours

Question 19

Normal line

Answer 19

A line at right angles to the surface from which angles are measured

Question 20

Metals are excellent conductors because…..

Answer 20

They contain free electrons

Question 21

Put the following into order, best to worst conductors of heat: Liquid, Solid, Gas

Answer 21

Solid, Liquid and Gas

Question 22

The 3 primary colours are?

Answer 22

Red, Blue and Green

Question 23

What colour does a blue book look when you shine red light onto it? Why?

Answer 23

It appears Black because blue books only reflect Blue light and absorb all other colours. Red light is absorbed