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NAVNEET PUBLICATION-LENSES-EXERCISE
- What is colour blindness?
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- Answer the following questions : What are some persons colour- blind?...
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- Answer the following questions : What are the difficulties faced by a...
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- Give scientific reasons : A convex lens is known as a converging len...
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- Give scientific reasons : A concave lens is known as a diverging len...
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- Give scientific reasons: Simple microscope is used for watch repair
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- Give scientific reasons : Watch repairers use a magnifying glass.
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- Give scientific reasons : In old age, a bifocal lens is necessary fo...
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- Give scientific reasons : A person suffering from myopia (nearsighte...
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- Give scientific reasons : A person suffering from hypermetropia (far...
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- Give scientific reasons : You cannot enjoy watching a movie from a v...
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- Give scientific reasons : We cannot clearly see an object kept at a ...
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- Give scientific reasons : One can sense colours only in bright light...
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- Give scientific reasons : The rays of light travelling through the o...
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- Give scientific reasons : A convex lens converges the rays of light ...
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- Give scientific reasons : A concave lens diverges the rays of light ...
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- Give scientific reasons : When a burning stick of incense is moved f...
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- Give scientific reasons : Colour- blind persons are unable to distin...
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- Give scientific reasons : It is risky to issue a driving license to ...
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- Distinguish between the following : Real image and virtual image.
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