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The speed of light in two media ' 1 ' and ' 2 ' are \({v}_{1}\) and \({v}_{2}\left(>{v}_{1}\right)\) respectively. For a…

Q1

The speed of light in two media ' 1 ' and ' 2 ' are \({v}_{1}\) and \({v}_{2}\left(>{v}_{1}\right)\) respectively. For a ray of light to undergo total internal reflection at the interface of these two media, it must be incident from

a

medium ' 1 ' and at an angle greater than \({\sin }^{-1}\left(\frac{{v}_{1}}{{v}_{2}}\right)\)

b

medium ' 1 ' and at an angle greater than \({\cos }^{-1}\left(\frac{{v}_{1}}{{v}_{2}}\right)\)

c

medium ' 2 ' and at an angle greater than \({\sin }^{-1}\left(\frac{{v}_{1}}{{v}_{2}}\right)\)

d

medium ' 2 ' and at an angle greater than \({\cos }^{-1}\left(\frac{{v}_{1}}{{v}_{2}}\right)\)

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