Waves

Question 0

Reflection

Answer 0

If below critical angle, light comes out of shape, if above, TIW

Question 1

EM Spectrum

Properties and uses

Answer 1

All can travel through vacuum and can travel at the speed of light in a vacuum.
Radio Waves-TV; Microwaves-microwave; infrared radiation-remotes; visible light-photography; UV light-sun beds; X-Rays-medical imaging; Gamma rays-cancer treatment

Question 2

Refraction

Snells law

Answer 2

Above critical angle, no refraction

n=Sini/Sinr. Out of material, 1/n=Sini/Sinr

Question 3

Types of waves

Answer 3

Longitudinal waves-the direction of oscillation is parallel to the direction of travel. Eg: sound, ultrasound.
Transverse waves-the direction of oscillation is at. Right angles to the direction of travel. Eg: light, waves on the surface water.

Question 4

Amplitude

Answer 4

Symbol: A
Unit: metres
The maximum displacement of a point from its rest position as a wave passes

Question 5

Wavelength

Answer 5

Symbol: λ
Unit: metresThe distance from any point on a wave to the equivalent point on the next wave

Question 6

Period

Answer 6

Symbol: T
Unit: seconds
Time taken for one oscillation to pass a point.

Question 7

Frequency

Answer 7

Symbol: f
Unit: Hertz (Hz)
The number of waves passing a point per second.

Question 8

v

Answer 8

fλ

Question 9

n

Answer 9

1/Sin(θc)

Question 10

T

Answer 10

1/f

Question 11

Angle of incidence and reflection

Answer 11

Are the same value