A convex lens is made of a material having refractive index 1 - 2- Both the surfaces of the lens are convex- If it is dipped into water -1 - 33- it will behave likea a convergent lensb a divergent lensc a rectangular slabd a prism-

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Physics

Image Formation by Convex Lens

A convex lens...

Question

A convex lens is made of a material having refractive index $1 \cdot 2$ . Both the surfaces of the lens are convex. If it is dipped into water ( $μ = 1 \cdot 33$ ), it will behave like
(a) a convergent lens
(b) a divergent lens
(c) a rectangular slab
(d) a prism.

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Solution

(b) a divergent lens

Since the refractive index of lens is less than that of of water and both the sides are convex, it will act like a normal diverging lens (though its focal length will change to negative).

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A convex lens is made of a material having refractive index 1·2. Both the surfaces of the lens are convex. If it is dipped into water (μ=1·33), it will behave like (a) a convergent lens (b) a divergent lens (c) a rectangular slab (d) a prism.

(b) a divergent lens Since the refractive index of lens is less than that of of water and both the sides are convex, it will act like a normal diverging lens (though its focal length will change to negative).

A convex lens is made of a material having refractive index $1 \cdot 2$ . Both the surfaces of the lens are convex. If it is dipped into water ( $μ = 1 \cdot 33$ ), it will behave like
(a) a convergent lens
(b) a divergent lens
(c) a rectangular slab
(d) a prism.

(b) a divergent lens

Since the refractive index of lens is less than that of of water and both the sides are convex, it will act like a normal diverging lens (though its focal length will change to negative).