Ray Optics and Optical Instruments

Related Questions

• An under water swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance from the surface of water equal to (Refractive Index of water is 4/3)

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• When light travels from glass to air, the incident angle is ${{\theta }_{1}}$ and the refracted angle is ${{\theta }_{2}}$. The true relation is

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• An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of

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• A ray of monochromatic light is incident on one refracting face of a prism of angle 75°. It passes through the prism and is incident on the other face at the critical angle. If the refractive index of the material of the prism is $\sqrt{2}$, the angle of incidence on the first face of the prism is

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• A lens is placed between a source of light and a wall. It forms images of area ${{A}_{1}}$ and ${{A}_{2}}$ on the wall for its two different positions. The area of the source or light is

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