Topic 5 - Light and the EM spectrum

Question 1

Angle of incidence=

Answer 1

Angle of reflection

Question 2

Total internal refelction occurs when

Answer 2

The wave is travelling through a dense material into a less dense material. When the angle of incidence is larger than the critical angle.

Question 3

Specular reflection

Answer 3

When waves are reflected in a single direction by a smooth surface.

Question 4

Diffuse reflection

Answer 4

When waves are reflected in all directions by a rough surface because the normal is different for each incident ray

Question 5

All different colours of light have

Answer 5

Different wavelengths

Question 6

Opaque objects

Answer 6

Dont transmit light

Question 7

White objects

Answer 7

Reflects all wavelengths of light equally

Question 8

Black objects

Answer 8

Absorb all wavelengths of light

Question 9

Transparent and translucent objects

Answer 9

Transmit light

Question 10

Coverging lenses

Answer 10

Bluge outwards in the middle and causes rays of light to converge together at the principal focus

Question 11

Diverging lenses

Answer 11

A diverging lens caves inwards and causes rays of light to spread out

Question 12

Principal focus on converging lenses

Answer 12

Where the rays meet after being refracted through the lens

Question 13

Principal focus on diverging lens

Answer 13

Where the rays meet if thye get traced backwards through the lens. It is before the lens.

Question 14

Focal length

Answer 14

The distance from the centre of th lens to the principal focus