Waves And Radiation

Question 1

What type of wave has a crest and a trough?

Answer 1

Transverse

Question 2

What is the distance between waves called?

Answer 2

Wavelength (m)

Question 3

What is the height of the wave from the axis to the crest called?

Answer 3

Amplitude (m)

Question 4

What is the symbol for wavelength?

Answer 4

λ

Question 5

What type of wave is a sound wave?

Answer 5

Longitudinal waves

Question 6

What is diffraction?

Answer 6

When longitudinal waves bend around an obstacle

Question 7

What type of wavelength diffracts more effectively?

Answer 7

Long wavelength

Question 8

What Is frequency?

Answer 8

How many waves are produced in one second (Hz)

Question 9

What is the speed of sound?

Answer 9

340 m/s

Question 10

How many types of EM radiation are there?

Answer 10

7 : Gamma rays, X rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio and Television waves

Question 11

What is an alpha particle?

Answer 11

A positive (2+) Helium nucleus, it is relatively slow and easily stopped by paper or skin. It has a high ionising power

Question 12

What is a Beta particle?

Answer 12

A negative (-) fast moving electron, it is quite fast and stopped by a few mm of aluminium. It has a medium ionising power.

Question 13

What is a Gamma ray?

Answer 13

A high energy EM wave with no charge, it is the stepped of light and reduced by a few inches of lead. It has a low ionising power

Question 14

When passing from air to glass, will light bend to or a away from the normal?

Answer 14

To the normal