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Physics: Vision (light) (The eye (perception of light , eye brain system,…
Physics: Vision (light)
The eye
perception of light , eye brain system
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iris(muscular diaphragm), pupil, sclera
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photo-receptors, rods and cones, takes them about 15 mins to adjust to difference in level in light
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colour vision
Issac Newton, white light contains all the colours of light on the spectrum
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a green apple appears green because all wavelengths except green are absorbed, green is reflected
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Presbyopia
inability of eye to accommodate increases with age
lens becomes larger and less flexible, collars muscles are less able to distort the lens