P3, The eye

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  • Created by: emmajane_
  • Created on: 17-05-14 15:37
What does the ciliary muscle in the eye do?
Causes changes in the shape of the lens, which allows light to be focused at varying distances
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What is being long sighted caused by?
The eyeball being too shot, or the lens being unable to focus
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What is being short sighted caused by?
The eyeba;ll being too long, or the lens being unable to focus
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What can eyes focus on, and specify them
Between near and far points. Near= 25cm approx. far= Infinity
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What is the film in he camera or the CCDs in a digital camera equivelant to?
The retina in the eye
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What is the power for a converging and diverging lens like?
Converging= positive Diverging= negative
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Which 2 things is the focal length of a lens determined by?
1. The refractive index from the material of which the lens is made 2. The curvature of the two surfaces of the lens
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How does the refraction index compare to a lens? What does this mean?
The greater the refraction index, the flatter the lens. Means the lens can be manuaftured thinner
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Other cards in this set

Card 2

Front

What is being long sighted caused by?

Back

The eyeball being too shot, or the lens being unable to focus

Card 3

Front

What is being short sighted caused by?

Back

Preview of the front of card 3

Card 4

Front

What can eyes focus on, and specify them

Back

Preview of the front of card 4

Card 5

Front

What is the film in he camera or the CCDs in a digital camera equivelant to?

Back

Preview of the front of card 5
View more cards

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