Lesson Objectives Explain how light travels Explain how we see objects Know how shadows are formed.

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Lesson Objectives Explain how light travels Explain how we see objects Know how shadows are formed

Light Travels from a light source into our eyes or Light travels to our eyes after being reflected off an opaque object.

Can you spot the mistake?

The eye

Cornea – protects the pupil Iris – controls the size of the pupil Lens – bends rays of light to form a clear image Pupil – lets light into the eye Retina – where the image is formed Optic nerve – sends messages to the brain

Molecular Expressions Microscopy Primer: Light and Color - Human Vision: Interactive Java Tutorial

THE EYE The pupil allows light to enter the eye. The lens helps to focus the light Light sensitive cells in the retina detect the light. A nerve impulse travels from the retina to the brain along the optic nerve where it is interpreted. The iris helps to change the size of the pupil

Are two eyes better than one? Vs.

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