Home Physics Ray Optics Concave and Convex Mirror/Lens and Focal Lenght A bi-convex lens made of glass (refractive i…
Physics Ray Optics Concave and Convex Mirror/Lens and Focal Lenght MCQ (Single Correct)

A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will

A
Decrease and change sign (b Increase and change sign
C
Decrease and remain of the same sign
D
Increase and remain of the same sign

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The correct answer is:
B

.

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