Ray Optics and Optical Instruments

Related Questions

• A convex lens of focal length 12 cm is made of glass of $\mu =\frac{3}{2}$. What will be its focal length when immersed in liquid of $\mu =\frac{5}{4}$

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• The critical angle for a medium is ${{60}^{o}}$. The refractive index of the medium is

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• A double convex lens of focal length 20 cm is made of glass of refractive index 3 / 2. When placed completely in water ${{(}_{a}}{{\mu }_{w}}=4/3)$, its focal length will be

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• The focal lengths of the objective and eye lenses of a telescope are respectively 200 cm and 5 cm. The maximum magnifying power of the telescope will be

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• The astronomical telescope consists of objective and eye-piece. The focal length of the objective is

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