Question

1. What happens to light when it gets dispersed?
2. What kind of lens is there in our eyes? Where does it form the image of an object?
3. When someone is suffering from cataract, which part of the eye gets affected?
How is it treated?
4. What is hypermetropia? How is it treated?
5. Explain the process
which enables us to perceive motion in a cartoon film.
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Answer 1

Answer:

1. its breaks into its constituent 7 colours
2. We have convex lens in our eyes. It forms the object on the retina by focusing the light at the backside of the eye.
3. In people suffering from cataract the eye lens becomes clouded. Cataract is treated by replacing the opaque lens with a new artificial lens.
4. Hypermetropia (hyperopia, long-sightedness or far- sightedness) is a form of refractive error in which parallel rays of light coming from infinity are focused behind the light sensitive layer of the retina, when the eye is at rest. ... Small hypermetropia may be corrected by voluntary accommodation.
5. Persistence of vision is the process wjich enables us to percieve motion in a cartoon film. Persistence of vision is the phenomenon in which the image of the object is retained on the retina for a very short period of time i.e. i/16th of a second even after the object is removed.

Explanation:

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