Light - Overview of light - Properties of light - Luminous and non-luminous objects - History of light - The electromagnetic spectrum - Prisms - Colour

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Where does light come from? The SUN!! The sun is a star located ___________________________ __________________________________, away from Earth. It provides energy in the form of light through a process called nuclear fusion. Nuclear fusion occurs when two atoms that naturally repelled each other ________________________ ___________________

The sun provides the energy that enables life on Earth.

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Light travels VERY FAST – 3.0X10 8 m/s = 300,000 kilometres per second. At this speed it can ____ ______

The Strangeness of Light The speed of light (c) is constant Nothing moves faster than the speed of light Anything with mass cannot travel at the speed of light …………….

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Light travels _____________________than sound. For example: 1)Thunder and lightning start at ) When a

We see things : Homework

Luminous and non-luminous objects A ___________object is one that produces light. A ____________ object is one that reflects light.

Fun Science Light Video

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Properties of Light summary 1)Light travels )Light travels ___________ 3)We see things because )

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Modern electromagnetic waves Today we ………………….._____________

Modern View Continued As we _____________

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The Surprising Universe Today Scientists use different portions of the electromagnetic spectrum to collect and analyze data about _____________ This provides them with completely different views compared with using visible light only

The Surprising Universe

Essential Knowledge, Skills, and Processes Analyze the …………………. _____________

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The colours of the rainbow: Red Orange Yellow Green Blue Indigo Violet

Prisms What happens when you place two prisms next to each other? Simulation Removed

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Adding colours White light can be split up to make separate colours. These colours can be added together again. The primary colours of light are ____________________ : Adding blue and red makes magenta (purple) Adding blue and green makes cyan (light blue) Adding all three makes white again Adding red and green makes yellow

Seeing colour The colour an object appears ______________ For example, a red book ___________________ White light Only red light is reflected

A white hat would reflect ____________________ Purple light White light

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In different colours of light this uniform would look different: Red light Shirt looks red, why? Shorts look black, why? Blue light Shirt looks black, why? Shorts look blue, why?

Using filters Filters can be used to “___________” out different colours of light: Red Filter Magenta Filter

Colour Blindness The tricky thing about colour blindness is (40% of

How many animals are there?

Blue Colour Blindness In both these cases

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