Ray Optics and Optical Instruments

Related Questions

• Monochromatic light of frequency $5\times {{10}^{14}}$Hz travelling in vacuum enters a medium of refractive index 1.5. Its wavelength in the medium is

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• While using an electric bulb, the reflection for street lighting should be from

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• The magnifying power of an astronomical telescope is 8 and the distance between the two lenses is 54 cm. The focal length of eye lens and objective lens will be respectively

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• With respect to air critical angle in a medium for light of red colour $[{{\lambda }_{1}}]$ is $\theta $. Other facts remaining same, critical angle for light of yellow colour $[{{\lambda }_{2}}$] will be

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• The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is

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