9.4 - The Electromagnetic Spectrum

Question 1

Electromagnetic spectrum

Answer 1

complete range of wavelengths of energy radiated as electric and magnetic fields

Question 2

Radio waves

Answer 2

low energy electromagnetic waves with a much lower frequency and longer wavelength than visible light

Question 3

Infra-red radiation

Answer 3

invisible radiation emitted by all warm objects. You feel infra-red radiation as heat.

Question 4

Visible light

Answer 4

very small part of the electromagnetic spectrum to which our eyes are sensitive

Question 5

Ultraviolet radiation

Answer 5

invisible radiation similar to light but with a slightly higher frequency and more energy

Question 6

X-Rays

Answer 6

high-energy electromagnetic waves that can be transmitted through solids and provide information about their structure

Question 7

Gamma Rays

Answer 7

high-energy electromagnetic radiation produced during nuclear reactions. They have no mass and travel at the speed of light.

Question 8

Electromagnetic waves

Answer 8

electromagnetic energy that is transmitted as moving electric and magnetic fields. There are many different types of electromagnetic energy, e.g. light, microwaves, radio waves.