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Q 1.
Name the part that shuts automatically to protect eyes is called?
Ans.
Eyelid.
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Q 2.
Human eye acts like a?
Ans.
Camera.
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Q 3.
The eye lens is?
Ans.
Transparent double convex lens.
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Q 4.
A normal eye can see objects clearly at?
Ans.
25 cm to infinity.
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Q 5.
Name the colour that has least deviated on passing through a prism?
Ans.
Red.
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Q 6.
Name the scientist who discovered " dispersion of light"?
Ans.
Newton.
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Q 7.
Photon is the unit of?
Ans.
Light.
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Q 8.
Which colour will be maximum dispersion in rainbow?
Ans.
Violet.
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Q 9.
Name the primary colours?
Ans.
Red, Blue and Green.
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Q 10.
Why Diamond shine?
Ans.
Total internal reflection.
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Q 11.
Name the colour of light that has more energy?
Ans.
Blue.
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Q 12.
Very fine particles scatter mainly in?
Ans.
Blue light.
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Q 13.
Name the phenomenon that take place during formation of rainbow?
Ans.
1.Refraction
2.Reflection 3.Dispersion. |
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Q 14.
In hypermetropia, the image of an object is formed?
Ans.
Behind the retina.
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Q 15.
A student has to face difficulty whole reading the blackboard in the class. What could be the defect the child is suffering from?
Ans.
Myopia.
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Q 16.
The angel at which the ray gets deviated is called?
Ans.
Angle of deviation.
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Q 17.
In human eye, the size of the pupil is controlled by?
Ans.
Iris.
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Q 18.
In human eye image is formed?
Ans.
On Retina.
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Q 19.
Ability of combination of dual vision of eyes is called?
Ans.
Binocular vision.
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Q 20.
Twinkling of stars due to?
Ans.
Refraction of light.
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