Question

formula in human eye and colourful world

Answer 1

hey hi.....

here are the formulae...

>> The power of a lens can be calculated by following formula:. p=1/f

>>The focal length and power of the required lens can be calculated by using the following formula:. 1/v - 1/u = 1/f


hope this helps...

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Answer 2

the human is a natural optical instrument used to see object.
1) retina is a light sensitive area.
2) cornea is a thin membrane which covers the eyeball
3) Aquos humor is a fluid which fills the space between cornea and eye lens
4) eye lens is a convex lense made of transparent and flexible jelly like material
5) pupil is a hole in the middle of Iris through which light enter the eye
6) ciliary muscle are the muscle which are attracted to eye lens and can modify the shape of eye lens
7) it controls the amount of light entering the eye by changing the size of pupil
8) optical nerve are the nerve which take the image to the brain in the form of electric signals