Ray Optics and Optical Instruments

Related Questions

• Wavelength of light used in an optical instrument are ${{\lambda }_{1}}=4000$Å and ${{\lambda }_{2}}=5000$Å, then ratio of their respective resolving power (corresponding to ${{\lambda }_{1}}$and ${{\lambda }_{2}})$is

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• A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a

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• If ${{\mu }_{_{0}}}$ be the relative permeability and ${{K}_{0}}$ the dielectric constant of a medium, its refractive index is given by

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• Continuous spectrum is not due to

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• Refractive index of glass is $\frac{3}{2}$ and refractive index of water is $\frac{4}{3}$. If the speed of light in glass is $2.00\times {{10}^{8}}$ m/s, the speed in water will be

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