Light

What is reflection?

• An object that emits light

• The absence of light

• When light bounces off an object

What is refraction?

• When a light wave changes direction as it moves from one transparent material to another.

• When the angle of incidence and reflection are equal.

• When an opaque object blocks light and creates a dark patch.

What is happening at label A?

• Refraction

• Reflection

What is happening at label B?

• Refraction

• Reflection

Is diagram A or diagram B correct?

• 
• 

What part of the eye is labelled C?

• The pupil

• The lens

• The optic nerve

Which best describes the pupil?

• Carries signals from the eye to the brain

• A hole through which the light enters

• Focuses light onto the retina

Is lens A or B concave?

• Lens A

• Lens B

What can you do to make a shadow bigger?

• Move it closer to the light source

• Move it further away from the light source

What types of material are reflective?

• Dull, dark materials

• Smooth, shiny materials