Ray Optics and Optical Instruments

Related Questions

• A lens of power + 2 diopters is placed in contact with a lens of power – 1 diopoter. The combination will behave like

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• The ratio of thickness of plates of two transparent mediums A and B is 6 : 4. If light takes equal time in passing through them, then refractive index of B with respect to A will be

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• When light of wavelength $\lambda $ is incident on an equilateral prism kept in its minimum deviation position, it is found that the angle of deviation equals the angle of the prism itself. The refractive index of the material of the prism for the wavelength $\lambda $ is, then

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• Light from sodium lamp is passed through cold sodium vapours, the spectrum of transmitted light consists of

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• A convex lens makes a real image 4 cm long on a screen. When the lens is shifted to a new position without disturbing the object, we again get a real image on the screen which is 16 cm tall. The length of the object must be

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