Two lenses (1) and (2) with `R_(1) = R_(2) = 0.20 m` each are made from glasses with `mu_(1) = 1.2 and mu_(2)` = 1.6 respectively. The two lenses with a separation of 0.345 m are submerged in a liquid with `mu_(1) = 1.4`. The focal lenghts of (1) and (2) are found. An object is placed at a distance of 1.3m from lens 1.
Two beams of red and violet colour are made to pass separately through a prism `("angle of the prism is" 60^(@))`. In the position of minimum deviation, the angle of regraction will be

Options

A. `30^(@)` for both the colours
B. Greater for the violet colour
C. Greater for the red colour
D. Equal but not `30^(@)` for both the colour.

Answer

A

Explanation

(a) In the condition of minimum deviation angle of refraction r = A / 2.
`r = 30^(@)`