Physics, asked by sangk9687, 1 year ago

the focal length of a convex lens made of the glass is 20 cm. what will be it's new focal length when placed in a medium of refractive index 1.25?

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The focal length of a convex lens made of glass is 20 cm. What will be its new focal length when placed in a medium of refractive index 1.25?

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