Physics Topic 4/5 Waves And Optics

Front 1

What are the two types of wave?

Back 1

Transverse and Longitudinal

Front 2

What's a Longitudinal wave?

Back 2

A wave where the medium moves in the same direction the wave travels eg sound waves and seismic waves

Front 3

What's a Transverse wave?

Back 3

A wave where the medium moves at a right angle to the direction of the wave eg light and water waves

Front 4

What is amplitude?

Back 4

The distance from the midpoint to the top of a crest or bottom of a trough measured in metres.

Front 5

What is the wavelength?

Back 5

The distance between two identical points on adjacent waves measured in metres .

Front 6

What is the period?

Back 6

how long it takes for 1 complete wave to pass a point measured in seconds.

Front 7

What is frequency?

Back 7

How many complete waves pass a point per second measured in hertz.

Front 8

What is the wave equation?

Back 8

Wave speed = frequency x wavelength

Front 9

How else can wave speed be worked out?

Back 9

Wave speed= distance÷time

Front 10

What is the law of reflection?

Back 10

The angle of incidence is equal to the angle of reflection

Front 11

What is refraction?

Back 11

The bending of a wave when it goes through another medium

Front 12

What are the two types of reflection?

Back 12

Specular and Diffuse

Front 13

What is Specular reflection

Back 13

It follows the law of reflection

Front 14

What is diffuse reflection

Back 14

It doesn't follow the law of reflection

Front 15

Why do waves refract?

Back 15

Because they change speed.

Front 16

What is ultrasound

Back 16

Above human range of 20,000 hertz

Front 17

What is infrasound

Back 17

Below human range of 20hertz

Front 18

What is a real image?

Back 18

An image that can be projected onto a screen and formed by only converging lenses

Front 19

What is a virtual image

Back 19

An image that cannot be projected onto a screen formed by diverging lenses and some converging lenses

Front 20

Converging Lenses

Back 20

Thicker in the middle and waves come closer together when they refract through them

Front 21

Diverging Lens

Back 21

Thinner in the middle waves grown further apart when refracted

Front 22

What do waves do?

Back 22

They transfer energy and information without transferring matter

Front 23

How is the velocity of sound in air measured?

Back 23

....

Front 24

State the human hearing range?

Back 24

20Hz-20 000Hz

Front 25

How is speed of water ripples measured?

Back 25

M...

Front 26

Jh

Back 26

Gg