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प्रश्न
Name two animals having eyes:
one the sides of the head.
उत्तर
Animals of prey, such as rabbits and deer, have eyes on the sides of the head so that they can see their enemies and become alert.
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संबंधित प्रश्न
Where does the greatest degree of refraction of light occur in the eye?
Describe and explain, how a normal eye can see objects lying at various distances clearly.
To focus the image of a nearby object on the retina of an eye:
(a) the distance between eye-lens and retina is increased
(b) the distance between eye-lens and retina is decreased
(c) the thickness of eye-lens is decreased
(d) the thickness of eye-lens is increased
Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas. Suggest reasons for this.
Mention if the following statement is true (T) or false (F) Give reason.
Sometimes medicines dropped into the eyes come into the nose and even throat
Mention if the following statement is true (T) or false (F) Give reason.
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Choose the correct answer.
Which one is the photoreceptor _____________
Differentiate between:
Yellow spot and Blind spot.
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in Figure . In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?
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(i) | (ii) | (iii) | (iv) |
Name the following:
The layer of the wall of the eye-ball that corresponds to the black lining of the box of a camera