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Our most important light source
Sun
A light source you may need to put cells in
Torch
Sunglasses are made of this type of glass
Tinted
A material that will not allow any light pass through it
opaque
This has to be transparent so that light can enter the room
window
The name given to a picture cut from black card to look like a shadow
Silhouette
These materials allow some light to pass through them
translucent
Light intensity used to be measured according to this
candle
An opaque object does this to light and cause a shadow to form
block
