Waves

Question 1

What is wavelength

Answer 1

This is the distance from one point in a wave to the corresponding point on the next wave

Question 2

What is amplitude

Answer 2

The height of a wave from the middle to the top (or middle to the bottom).

Question 3

What is frequency

Answer 3

The number of waves per second

Question 4

What is the period

Answer 4

The time taken for one complete wave to pass a point

Question 5

What is wave speed

Answer 5

Distance traveled by wave in one second

Question 6

What are the 2 types of waves?

Answer 6

Transverse waves and longitudinal waves

Question 7

How do transverse waves move?

Answer 7

The particles move at right angles to the direction of energy travel

Question 8

How do longitudinal waves move?

Answer 8

The particles move parallel to the direction of energy travel

Question 9

What waves are transverse?

Answer 9

Water and all the waves on the electromagnetic spectrum are transverse waves

Question 10

What waves are longitudinal?

Answer 10

Sound waves are longitudinal waves

Question 11

What is the formula for frequency?

Answer 11

f=N/t

Question 12

What is the formula for the period?

Answer 12

T=1/f

Question 13

What is the formula for the Wave equation?

Answer 13

v=f λ

Question 14

What is the formula for speed, distance and time?

Answer 14

V=d/t d=v/t

Question 15

What is the symbol and unit for wavelength?

Answer 15

Symbol- λ
Unit- Metre (m)

Question 16

What is the unit for amplitude?

Answer 16

Unit- metre (m)

Question 17

What is the symbol and unit for frequency?

Answer 17

Symbol- f
Unit- Hertz (Hz)

Question 18

What is the symbol and unit for the period?

Answer 18

Symbol- T
Unit- second (s)

Question 19

What is the symbol and unit for wave speed?

Answer 19

Symbol- v
Unit- Metres per second (ms^-1)

Question 20

When does diffraction occur?

Answer 20

Diffraction occurs when waves pass through a gap or around an object

Question 21

True or false: Short wavelengths diffract more that long wavelengths

Answer 21

False: long wavelengths diffract more than short wavelengths

Question 22

What happens if the gap is less than a wavelength?

Answer 22

Circular wavefronts are produced

Question 23

What happens if the gap is greater than a wavelength?

Answer 23

If the gap is greater than a wavelength then only the ends of the waves show diffraction

Question 24

What do all the parts of the electromagnetic spectrum travel at?

Answer 24

The speed of light

Question 25

What are the parts of the electromagnetic spectrum?

Answer 25

Radio, microwave, infrared, visible, ultraviolet, x-ray, gamma ray

Question 26

Electromagnetic spectrum- What has the highest frequency?

Answer 26

Gamma radiation

Question 27

What is refraction of light?

Answer 27

When light passes from one medium to another its speed and wavelength changes. The direction of the ray may also change.

Question 28

What happens when light enters a block at a right angle?

Answer 28

The light will pass straight through it

Question 29

What happens when light passes through a block at an angle?

Answer 29

The light appears to bend

Question 30

Refraction of light- what is the normal?

Answer 30

The normal is a reference line, drawn at right angles to the surface where the incident ray touches it.

Question 31

What happens when light passes through a semicircular block on the curve side?

Answer 31

The light travels along the normal. The light is refracted when it leaves the block as long as the angle of the incident is below a certain value for that material

Question 32

What happens when light passes through a triangular prism?

Answer 32

When light passes through a prism it will change direction as it enters and as it leaves the block due to refraction.

Question 33

What is <i ?

Answer 33

<i= angle of incidence

Question 34

What is <r ?

Answer 34

<r= angle of refraction