What is Astigmatism ? How it is correcte...

What is Astigmatism ? How it is corrected ?

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Momentum is a quantity .
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Anemia can be cured by isotope.
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One calorie is the amount of heat energy required to raise the tempera...
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LED stands for.
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is the frequency of the sound as heard by the listener.
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What is Astigmatism ? How it is corrected ?
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has the greatest penetration power.
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The value of Avogardro's number is .
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The radioactive isotope used in estimating the age of specimens is .
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lens is thicker at the centre than at the edges.
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………………………………. is used to change the speed of car.
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The radio isotope of helps to increase the productivity of crops.
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The wiring in a house consists of circuit.
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Rapid back and forth motion of a particle about its mean position is c...
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The refractive index of a transparent medium is always greater than .
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Nuclear Fusion : Extreme temperature :: Nuclear fission:
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Violet : lowest wavelength :: Red :
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1kcal:Heat requried:: 1joule:.
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The unit of moment of force......
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Iron : 5950ms^(1)::Water :
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