@Light is:
A form of energy
Cannot do work
A form of heat

@Compared to a dim light, a bright light:
Has more energy
Has less energy
Is more colourful

@Blue light:
Has more energy then red light
Has the same amount of energy as red light
Has less energy then red light

@Light can:
Only travel in straight lines
Pass through anything
Not travel at all

@When we draw light rays we draw:
Straight lines with arrows on them
Arrows only
Straight lines

@Clear glass is:
Transparent
Opaque
Translucent

@Which of the following is luminous?
The Sun
The Moon
A white sheet of paper

@Shadows are caused because:
Light travels in straight lines
All objects block light
Light can be reflected

@A shadow will have an umbra and penumbra if:
An extended source is used
A point source is used
A large object is used

@The Sun causes sharp shadows because:
Its light is parallel
Its light is diverging
Its light is converging

@The umbra is:
The darkest part of a shadow
The lightest part of a shadow
The name for white light

@An eclipse of the sun is caused when:
The moon is between the Sun and the Earth
The Earth is between the Sun and the Moon
The Sun is between the Moon and the Earth

@In a pinhole camera the image is always:
Upside down
Smaller than the object
Larger than the object

@With 3 pinholes in a pinhole camera there will be:
3 images
No image
3 objects

@A large pinhole in a pinhole camera will make:
A blurred image
A large image
A coloured image

@If an object is moved nearer the pinhole of a pinhole camera the image will:
Be larger
Be smaller
Not change

@The lens in the eye helps to:
Focus the image
Make the image smaller
Colour the image

@A ray of light enters a fibre optic cable. Once inside the fibre the ray is:
#fibre1
totally internally reflected
refracted by a constant amount
continually absorbed

@As a ray of light first enters a fibre optic cable it is:
#fibre1
refracted
totally internally reflected
aborbed

@Light can travel down fibre optic cables without escaping through the sides of the fibre. This is made possible by:
total internal reflection of the light
using a very thin and flexible fibre
absorption of the light by the fibre
