Ray Optics and Optical Instruments

Related Questions

• A triangular prism of glass is shown in the figure. A ray incident normally to one face is totally reflected, if $\theta ={{45}^{o}}$. The index of refraction of glass is

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• The diameter of the objective of a telescope is $a$, its magnifying power is $m$ and wavelength of light is $\lambda .$The resolving power of the telescope is

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• For a telescope to have large resolving power the

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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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• A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a

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