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Assertion : A convex lens of glass (mu ...

Assertion : A convex lens of glass `(mu = 1.5)` behave as a diverging lens when immersed in carbon disulphinde of higher refractive index `(mu = 1.65)`.
Reason : A diverging lens is thinner in the middle and thicker at the edges.

A

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

B

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

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
`mu = (mu_(g))/(mu_(c)) = (1.5)/(1.65) lt 1`
As `1/f = (mu- 1) (1/(R_(1)) - 1/(R_(2)))`
`:. f` becomes negative.
Therefore, the lens behaves as a diverging lens.
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