1.

Two beams of red and violet colours are made to pass separately through a prism of A = 60^(@). In the minimum deviation position, the angle of refraction inside the prism will be

Answer»

greater for red colour
equal but not `30^(@)` for both the COLOURS
greater for VIOLET colour
`30^(@)` for both the colours.

Solution :(d) Here, Angle of prism, A = `60^(@)`
For minimum deviation, A = 2r
or `"" R = (A)/(2) = (60^(@))/(2) = 30^(@)` for both colours.


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