Waves

Question 1

Wavelength

Answer 1

Is the distance from one peak to the next

Question 2

Frequency

Answer 2

Is how many complete waves there are in one second

Question 3

Amplitude

Answer 3

Height of the wave (rest and crest)

Question 4

Speed

Answer 4

How fast it goes

Question 5

Period

Answer 5

Is the time it takes for one wave to pass a certain point

Question 6

Transverse waves

Answer 6

Where the vibrations are at 90 degrees to the direction energy is transferred by the wave

Question 7

Longitudinal waves

Answer 7

Where the vibrations are at the same direction as the wave transfers energy

Question 8

Ray diagrams must be

Answer 8

1. Same size
2. Directly opposite the object
3. Same distance from the mirror
4. Laterally inverted

Question 9

Refraction

Answer 9

Is where the light Ray changes direction when going through a transparent object

Question 10

Strength of refractions

Answer 10

1. More dense object the light will bend towards the normal

2. With a less dense object it bends away from the normal

Question 11

A spectrum is formed when

Answer 11

A ray of white light is directed at a prism

Question 12

Total internal reflection

Answer 12

Above the critical angle the light is reflected within the shape and leaves no medium

Question 13

Critical angle

Answer 13

The light is reflected along the boundary

Question 14

Name the electromagnetic spectrum and their uses

Answer 14

1. Radio waves- radios and TV
2. Microwaves- mobile phones
3. Infra-red- night vision
4. Visible light- seeing, optical fibres
5. Ultraviolet- UV tanning tubes
6. X-Ray’s- observe internal structures
7. Gamma rays- sterilising equipment

Question 15

Trends of electromagnetic waves

Answer 15

1. They are all transverse waves
2. They travel at the speed of light in a vacuum
3. They can all be refracted, reflected and diffracted