P6 - Waves

Question 1

What does a wave transfer?
A. Energy
B. Matter
C. Nothing

Answer 1

A. Energy

Question 2

In which type of wave are there compressions and rarefactions?

Answer 2

In longitudinal waves. (A compression is where the matter has bunched together and a rarefaction is where it has spread out)

Question 3

Amplitude is given by the vertical distance between which two points in the diagram?

Answer 3

A and C. (Amplitude is measured between the waves undisturbed position and it’s maximum displacement).

Question 4

When a wave meets a boundary, it may be reflected or absorbed. State the further possible outcome.

Answer 4

It may be transmitted.

Question 5

On a wave front diagram, what does the distance between adjacent wavefronts show about the wave?
A. Amplitude. B. Wavelength.
C. Frequency

Answer 5

B. wavelength

Question 6

Describe how the wavelength and frequency of electromagnetic waves change as the spectrum progresses from radio waves through to gamma waves.

Answer 6

Frequency increases and wavelength decreases.

Question 7

What type of electromagnetic wave lies between visible light and X-rays on the electromagnetic spectrum?

Answer 7

Ultraviolet light

Question 8

True or false? Human eyes can detect all electromagnetic waves.

Answer 8

False. Human eyes can only detect visible light.

Question 9

What is infrared radiation used for?

Answer 9

Heating, cooking, infrared cameras

Question 10

True or false? Infrared radiation is made up of longitudinal waves.

Answer 10

False. Infrared waves are part of the electromagnetic spectrum. All electromagnetic waves are transverse.

Question 11

Name two types of electromagnetic waves that are used in medical treatments.

Answer 11

Gamma rays and X-rays. Both used in treatment of cancer.

Question 12

Give a use of ultraviolet waves and a use of radio waves.

Answer 12

Ultraviolet waves - energy efficient lighting and sunbeds.
Radio waves - transmitting TV/FM radio.

Question 13

Which region of the electromagnetic spectrum is useful for both cooking and satellite communications?

Answer 13

Microwaves

Question 14

What is meant by the term radiation dose?

Answer 14

Radiation dose is a measure of the risk of harm from the body being exposed to radiation.

Question 15

What dangers are associated with exposure to ultraviolet radiation?

Answer 15

Sunburn
Premature ageing
Blindness
Skin cancer