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Assertion : By increasing the diameter ...

Assertion ` :` By increasing the diameter of the objective of telescope, we can increase its range.
Reason `:` The range of a telescope tells us how far away a star of some standard brightness can be spotted by telescope.

A

If both assertion and reason are true and reason is the correct explanation of assertion .

B

If both assertion and reason are true but reason is not the correct explanation of assertion .

C

If assertion is true but reason is false .

D

If assertion and reason both are false .

Text Solution

Verified by Experts

The correct Answer is:
B
The light gathering power (or brightness) of a telescope `prop` `("diameter")^(2)` . So by increasing the objective diameter even far off stars may produce images of optimum brightness .
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