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Types of Lenses

A convex glas...

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A convex glass lens (refractive index= 1.5) has a focal length of 8cm when placed in air. what is the focal length of the lens when it is immersed in water?(refractive index=4/3)

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Q. A glass convex lens has a focal length of

20

cm in air. What will be its focal length, when it is completely immersed in a liquid of refractive index

1.63

_{a} μ_{g} = 1.5

Q. A convex glass lens

(μ_{g} = 1.5)

has a focal length of 8 cm when placed in air. What is the focal length lens when it is immersed in water?

(μ_{ω} = \frac{4}{3})

Q. A convex lens of refractive index

1.5

has a focal length of

18 c m

in air. Calculate its focal length when it is immersed in water of refractive index

\frac{4}{3} . t a k e f_{1} = 18

.

Q. A thin lens of refractive index 1.5 has a focal length 15 cm in air. When the lens is placed in a medium of refractive index 4/3, what is the new focal length?

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