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प्रश्न
The upper half of a convex lens is made of one transparent medium while the lower half is made of another medium. Will this affect the focal length of the lens? Explain.
स्पष्ट करा
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उत्तर
Yes, this will affect the focal length of the lens, and the lens will have two different focal lengths.
According to the Lens Maker's Formula, the focal length (f) of a lens depends on the refractive index (n) of its material:
`1/f = (n - 1) (1/R_1 - 1/R_2)`
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