Light is a form of radiation: a small amount of energy. When light bounces of a surface into your eye, you can see that object.
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Outside eye
You eye has a bunch of different parts on the outside. The light goes through your pupil in your eye. Your pupil can change in size, depending on the amount of light.
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Muscles pupil
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Inside eye
There are also a lot of parts inside your eye.
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How does the eye work?
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Retina
Your retina is the part where the nerve cells convert the stimulus to a impulse. You have 2 different types of nerve cells in your eye: rods (black and white) and cones (colour).
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Glasses
Sometimes your lens can't make a sharp image. In that case, you can get extra lenses (glasses). When you are shortsighted you can see up close and you need a concave lens. When you are farsighted, you ned convex lenses (reading glasses).
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Get to work!
The homework for next week will be the exercises of page 54 and 55. You can start working on them now.
Lesson duration is: 60 min
