Question:
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 large size lenses.
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 large size lenses.
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 large size lenses.
Show Hint
A lens can be supported only at its rim, whereas a mirror can be supported over its whole back surface.
Updated On: Oct 31, 2026
- Statement-1 is true and Statement-2 is false.
- Statement-1 is false and Statement-2 is true.
- Statement-1 and statement-2 are true and Statement-2 is correct explanation for statement-1.
- Statements-1 and statement-2 are true and Statement-2 is not the correct explanation for statement-1.
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The Correct Option is C
Solution and Explanation
Statement-1 is true: very large astronomical telescopes are reflectors.
Statement-2 is true: a mirror reflects from one surface, so it can be supported over its entire back; a lens is transparent and can be held only at its edges, so a very large lens would sag under its own weight and distort. A mirror also has no chromatic aberration.
Because the ease of mechanical support of large mirrors is one of the main reasons for choosing reflectors, Statement-2 correctly explains Statement-1.
Answer: (3) Statement-1 and statement-2 are true and Statement-2 is correct explanation for statement-1
Statement-2 is true: a mirror reflects from one surface, so it can be supported over its entire back; a lens is transparent and can be held only at its edges, so a very large lens would sag under its own weight and distort. A mirror also has no chromatic aberration.
Because the ease of mechanical support of large mirrors is one of the main reasons for choosing reflectors, Statement-2 correctly explains Statement-1.
Answer: (3) Statement-1 and statement-2 are true and Statement-2 is correct explanation for statement-1
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