Assertion: A double convex lens (μ = 1.5) has focal length 10 cm. When the lens is immersed in water (μ = 4/3) its focal length becomes 77 cm.

Reason: \( \frac{1}{f} = \left( \frac{μ_l}{μ_w} - 1 \rig

Question

Assertion: A double convex lens (μ = 1.5) has focal length 10 cm. When the lens is immersed in water (μ = 4/3) its focal length becomes 77 cm.

Reason: $ \frac{1}{f} = \left( \frac{μ_l}{μ_w} - 1 \right) \left( \frac{1}{R_1} - \frac{1}{R_2} \right) $

Accepted Answer

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Answer

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

Answer

Assertion is true but Reason is false.

Answer

Both Assertion and Reason are false.

AIIMS 2008 Physics Lens Formula Assertion Reason Question