Lesson: Light. Science Differentiation in action What is this called? Crooke’s radiometer. What does it show? Light is a form of energy.

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Presentation transcript:

Lesson: Light

Science Differentiation in action What is this called? Crooke’s radiometer. What does it show? Light is a form of energy.

Science Differentiation in action The sun is a source of energy. Light is a form of energy.

Science Differentiation in action Can you recall the Law of Conservation of Energy? Energy cannot be created or destroyed but it can be changed from one form into another. Solar cell Light Electricity

Science Differentiation in action Light travels at 300 million metres per second. For example, it takes about 1.3 seconds for light from earth to reach the moon.

Science Differentiation in action Luminous objects make their own light. Can you name some?

Science Differentiation in action Stars are luminous.

Science Differentiation in action We see non-luminous objects because they reflect light.

Science Differentiation in action What does this experiment show? Observer Light bulb Card with a small hole in it’s centre

Science Differentiation in action How are shadows formed? Light bulb Object Shadow Screen

Science Differentiation in action What does this picture show? How is it formed?

Science Differentiation in action 1. Light is a form of _________. Review Questions 2. Light travels in ___________ lines. 3. Name this piece of equipment.

Science Differentiation in action What colour is the light from the sun? Question to think about!