# Light & Energy Transfers

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What are LUMINOUS objects?
Luminous objects give out light
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What are NON- LUMINOUS objects?
Non- Luminous objects do not give out light.
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Give examples of LUMINOUS objects.
SUN, TORCH, MATCH, FIRE, STARS. ECT.
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Give examples of NON- LUMINOUS objects.
BOOK, CAR, HUMAN, PLANTS, TABLE, CHAIR. ECT.
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How do you calculate the speed of light?
You divide the distance by time. Distance= 80.000km Time= 1/7 sec (80,00 / 1/7 = 0.1457)
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Explain two ways of which shadows can change size.
Depending on the amount of the source of light, eg. More sunlight means bigger shadow. Also moving the light source closer towards the object.
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Describe how light is refracted on plane(flat) surfaces.
Light is reflect from the surface.
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Describe how curved mirrors work.
There are 2 types of mirrors- Concave and convex. They have surfaces which are shaped like a part of a sphere.
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Describe how prism affects white light.
The light which is reflected on the prism surface bounces off a ray in the flat surface.
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Describe how coloured filters and coloured lights have a coloured object.
For example when white light shines on a red object, all the colours that form the whit light are absorbed except red.
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How are colours useful for everyday life?
Colours help us identify the differences between object. Another example of colours is that it influences our decisions
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What is the law of reflection?
Angle of incident = Angle of reflection
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## Other cards in this set

### Card 2

#### Front

What are NON- LUMINOUS objects?

#### Back

Non- Luminous objects do not give out light.

### Card 3

#### Front

Give examples of LUMINOUS objects.

### Card 4

#### Front

Give examples of NON- LUMINOUS objects.

### Card 5

#### Front

How do you calculate the speed of light?