This question has statement-1 and statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.
Statement-1 : Very large size telescopes are reflecting telescopes instead of refracting telescopes.
Statement-2 : It is easier to provide mechanical support to large size mirrors than the lenses of same optical activity.

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S-I is false and S-2 is true

S-I is true and S-2 is false

S-I & S-2 are true and explanation for S-1

S-I & S-2 are true and S-2 is not the correct explanation for S-1

answer is C.

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Detailed Solution

Very large size telescopes need large size mirrors and since once side of the mirrors is opaque it's easier to provide mechanical support. In case of lenses, since both sides are transparent its is harder to provide proper support when used in larger sizes. That is why large telescopes are reflecting telescopes.

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