Ray Optics and Optical Instruments

Related Questions

• A man is $180cm$ tall and his eyes are $$ below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of $1m$ from him. The minimum length of the plane mirror required is

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• The power of an achromatic convergent lens of two lenses is $+ 2D$. The power of convex lens is $+ 5D$. The ratio of dispersive power of convex and concave lens will be

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• In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations ${{\delta }_{m}}$ and angle of refraction $r$ will be correct

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• Two thin lenses of focal lengths ${{f}_{1}}$ and ${{f}_{2}}$ are in contact and coaxial. The combination is equivalent to a single lens of power

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• For a real object, which of the following can produced a real image

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