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Question
Tue March 13, 2012 By: Devarshee

# plz..xplain d concept of sin or theta related 2 refraction of light..

Wed March 14, 2012

Snell's law states that the ratio of the sines of the angles of incidence and refraction is equivalent to the ratio of phase velocities in the two media, or equivalent to the opposite ratio of the indices of refraction:



with each $\theta$ as the angle measured from the normal, $v$ as the velocity of light in the respective medium (SI units are meters per second, or m/s) and $n$ as the refractive index (which is unitless) of the respective medium.

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Wed February 15, 2017

# in an experiment the focal length of a convex lens a student obtained a sharp and inverted image of a distant tree on the screen behind the lens.she then removed the screen and looked through lens in the direction of the object .she will see a) an inverted image of the tree at the focus of the lens b)no image as the screen is removed c) a blurered image on the wall of laboratory d0 an erect image of the tree on the lens pls explain me the answer elaborately

Sun January 29, 2017

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