Chapter 3 - Waves + EM Spectrum

Question 1

How do you work out the wave speed?

Answer 1

Frequency x Wave Length

Question 2

Name three properties of EM Spectrum (3)

Answer 2

They are all Transverse waves
They all travel at speed of light
They can travel in a vacuum (No particles/Space)

Question 3

Put the EM Spectrum waves in order (highest frequency to lowest)

Answer 3

Gamma Rays, X Rays, Ultra Violet, Visible Light, Infra Red, Microwaves and Radio Waves

Question 4

What are the dangers of Ultra Violet waves?

Answer 4

UV Rays can damage eyes

Lead of blindness

Question 5

What are the uses of Ultra Violet waves? (3)

Answer 5

Hospitals use UV lamps to sterilise equipment.

Food and Companies also use UV Lamps to sterilise their products.

Question 6

Do Gamma Rays have any dangers?

Answer 6

No

Question 7

Name two uses of Gamma Rays

Answer 7

Used in medicine to treat internal organs

Gamma Rays are also used to kill cancer cells.

Question 8

What are the two types of waves? (2)

Answer 8

Longitudinal and Transverse

Question 9

What is ‘Amplitude’?

Answer 9

Height of the wave

Question 10

What is ‘frequency’?

Answer 10

How many complete waves there are per second