Ray Optics and Optical Instruments

Related Questions

• Light travels through a glass plate of thickness t and having refractive index $n$. If $c$ is the velocity of light in vacuum, the time taken by the light to travel this thickness of glass is

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• If $\hat{i}$ denotes a unit vector along incident light ray, $\hat{r}$ a unit vector along refracted ray into a medium of refractive index $\mu $ and $\hat{n}$ unit vector normal to boundary of medium directed towards incident medium, then law of refraction is

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• An object of length 6 cm is placed on the principle axis of a concave mirror of focal length f at a distance of 4f. The length of the image will be

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• Dispersion can take place for

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• The focal lengths for violet, green and red light rays are ${{f}_{V}},{{f}_{G}}$and ${{f}_{R}}$ respectively. Which of the following is the true relationship

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