Assertion :Electromagnetic lenses are used in light microscope whereas achromatic lenses are used in electron microscope. Reason: Resolving power of electron microscope is 0.2 $˚ A$ .

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is D Assertion is incorrect but Reason is correct.
An achromatic lens is a lens that is designed to limit the effects of chromatic and spherical aberration. An achromatic lens is used in light microscopy while an electromagnetic lens is used in electron microscopy.
Resolving power refers to the capacity of an instrument to resolve two points which are close together. The resolving power of electron microscope is 0.2 $˚ A$ . So, the correct answer is option D.

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