A person walking in a dark corridor enters into a brightly lit room :
(a) State the effect on the pupil of the eye.
(b) How does this affect the amount of light entering the eye ?
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What can you see in a completely dark room ? If you switch on an electric bulb in this dark
When we see in a completely dark room, we are not able to see anything because there is no light in the dark room. (a) We can see bulb due to...
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What job does the pupil of the eye do ?
Pupil expands or contracts according to the intensity of light around the eye.
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The part of eye which alters the size of the pupil is………….
The part of eye which alters the size of the pupil is iris
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What changes take place in the shape of eye-lens : (a) when the eye is focused on a near object ? (b) when the eye is focused on a distant object ?
(a) Eye-lens becomes thicker. (b) Eye-lens become thinner.
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What happens to the size of pupil of our eye 1. in dim light 2. in bright light ?
1. In dim light, pupil becomes large. 2. In bright light, puoil becomes small.
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Explain the functions of the following parts of the eye : (a) cornea (b) iris (c) pupil (d) ciliary muscles (e) eye-lens(f) retina (g) optic nerve
a. Cornea: It is the front part of the eye. The light coming from objects enters the eye through cornea. b. Iris: It controls the amount of light entering the eye. c....
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When is a person said to have developed cataract in his eye ? How is the vision of a person having cataract restored ?
A person is said to have developed cataract when the eye lens becomes progressively cloudy resulting in blurred vision. The vision of a person having cataract can be restored after...
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The near point of a long-sighted person is 50 cm from the eye.The near point of a long-sighted person is 50 cm from the eye
(a) (i) No, (ii) Yes (b) Converging lenses
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Explain clearly why, a person who has lost the sight of one eye is at a disadvantage compared with the normal person who has two good eyes.
A person who has lost the sight of one eye has a narrower field of view than the normal person who has two good eyes. Also, the person with one...
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The coloured part of the eye is called 1. retina 2. iris 3. lens 4. pupil
The coloured part of the eye is called 2. iris
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