The Electromagnetic Spectrum

Question 1

What are the seven types of electromagnetic radiation in order:

Answer 1

Radio wave, micro wave, infrared radiation, visible light, ultraviolet, x-ray, gamma ray

Question 2

What are the uses of radio waves:

Answer 2

TV signals

Question 3

What are the uses of micro waves:

Answer 3

Cooking, phones

Question 4

What are the uses of infrared radiation:

Answer 4

Optical fibre communication

Question 5

What are the uses of visible light:

Answer 5

Seeing (duh)

Question 6

What are the uses of ultraviolet light:

Answer 6

Detecting forged bank notes

Question 7

What are the uses of x-rays:

Answer 7

(do we have to do this?) medical images of bones

Question 8

What are the uses of gamma rays:

Answer 8

Killing cancer cells (yeah!)

Question 9

What are the hazards of micro waves:

Answer 9

They heat body tissue

Question 10

What are the hazards of infrared radiation:

Answer 10

It’s felt as heat and can cause burns

Question 11

What are the hazards of x- and gamma rays:

Answer 11

They can cause mutations in cells which may lead to cancer and cell death (reassuring)

Question 12

What is the speed of light:

Answer 12

299,792,458 m/s (300,000,000)

Question 13

Who first measured the speed of light:

Answer 13

Olaus Roemer, a Danish astronomer

Question 14

How was the speed of light first measured:

Answer 14

By examining the eclipses on Jupiter

Question 15

What other ways have the speed of light been calculated:

Answer 15

With lasers, microwaves and a rotating mirror amongst others

Question 16

Define the electromagnetic spectrum:

Answer 16

A continuous range of wavelengths

Question 17

The shorter the wavelength of light:

Answer 17

The more light is refracted

Question 18

At the lower end of the spectrum:

Answer 18

The waves are longer, have less energy and a lower frequency

Question 19

At the higher end of the spectrum:

Answer 19

The waves are shorter, have more energy and a higher frequency