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- @Light is:
- A form of energy
- Cannot do work
- A form of heat
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- @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
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- @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
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- @The Sun causes sharp shadows because:
- Its light is parallel
- Its light is diverging
- Its light is converging
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- @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
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