An equilateral prism is made of glass whose refractive index for red and violet light is 1.510 and 1.550 respectively. White light is incident at an a

Monjur Alahi

An equilateral prism is made of glass whose refractive index for red and violet light is 1.510 and 1.550 respectively. White light is incident at an angle of incidence i and the prism is set to give minimum deviation for red light. Find
(a) angle of incidence
(b) angular dispersion (i.e., angular width of the spectrum).
Given
`{:(theta=,28^(@),32^(@),50^(@),55^(@)),(sin theta=,0.487,0.529,0.755,0.819):}`


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Salim Ahmed Kawsar

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Correct Answer - `5^(@)`

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