Y8: Light and colour

• Physics
• Lower Secondary (Key Stage 3)

Y8: Light and colour

Reflection

Both

Refraction

Light bounces of a surface.

Light passes through a different material.

Light changes direction.

Light changes speed.

Mirror

Normal

Incident ray

Reflected ray

Angle of incidence

Angle of reflection

Normal

Incident ray

Refracted ray

Angle of incidence

Angle of refraction

Light bouncing off a surface is called...

1. Reflection
2. Refraction
3. Dispersion

Light splitting into a spectrum is called...

1. Reflection
2. Refraction
3. Dispersion

What is refraction?

Which of the 7 colours has the highest frequency?

1. UV
2. Violet
3. Dark red
4. Infrared

dispersion

white

prism

violet

red

continuous

What are the primary colours?

Which colour is NOT a primary colour?

1. Red
2. Yellow
3. Green
4. Blue

What colour do blue and green make?

1. Cyan
2. Magenta
3. Yellow

What colour do blue and red make?

1. Cyan
2. Magenta
3. Yellow

What colour do green and red make?

1. Cyan
2. Magenta
3. Yellow

Red

Green

Blue

Cyan

A dog appears black because it ............. all colours of light.

1. Absorbs
2. Reflects

Paper appears white because it ............. all colours of light.

1. Absorbs
2. Reflects

A postbox appears red because it reflects ............. light.

1. All
2. Blue
3. Red
4. No

Grass appears green because it absorbs ......................... and ........................ light and reflects ............................. light.

red

green

blue

A ball appears blue because it absorbs ......................... and ........................ light and reflects ............................. light.

red

green

blue

A rubber duck appears yellow because it reflects both ........................... and ........................ light.

red

green

blue