Electromagnetic Waves

Question 1

What is the Electromagnetic Spectrum?

Answer 1

A group of waves of different frequencies that forms a continuous spectrum

Question 2

What are the different frequencies of waves that make up the Electromagnetic Spectrum?

Answer 2

Radio, Microwave, Infrared, Visible Light, Ultraviolet, X-Rays, Gamma Rays
In order of decreasing wavelength, increasing frequency

Question 3

What type of wave is an Electromagnetic Wave?

Answer 3

Transverse Wave

Question 4

What is a Transverse Wave?

Answer 4

Wave with vibrations at right angles to direction of transfer of energy

Question 5

What are Electromagnetic Waves?

Answer 5

Oscillating electric and magnetic fields

Question 6

What emits electromagnetic waves and where do they go after this?

Answer 6

Waves transfer energy from sources eg. sun, microwave ovens to absorbers eg. skin, food

Question 7

How do you produce radiowaves?

Answer 7

Oscillating p.d. across a wire makes electrons move backwards and forwards producing changing electric and magnetic field emitted as a radiowave
OR
By movement of electrons in atoms

Question 8

How do you detect radiowaves?

Answer 8

When changing electric and magnetic fields meet another piece of metal, it makes the electrons move, producing an electrical signal