Ray Optics and Optical Instruments

Related Questions

• An eye specialist prescribes spectacles having a combination of convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination in diopters is

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• A thin prism ${{P}_{1}}$ with angle 6° and made from glass of refractive index 1.54 is combined with another thin prism P2 of refractive index 1.72 to produce dispersion without deviation. The angle of prism ${{P}_{2}}$ will be

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• In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are $\omega \omega ‘$and $d, d’$ respectively. The condition for getting deviation without dispersion when the two prisms are combined is

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• A plano convex lens $(f=20cm)$is silvered at plane surface. Now $f$ will be

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• Critical angle for light going from medium (i) to (ii) is $\theta$. The speed of light in medium (i) is $v$ then speed in medium (ii) is

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