Question 320: Ray Optics

Question

A beam of light consisting of red, green and blue colours is incifent on a right angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths are 1.39,  1.44  and 1.47 respectively.
The prism will
![](https://neetcare-image.cdn.examgoal.net/1qpq2yck7oylnfw/1a49a62b-c5b2-407d-a526-4b59ff150d3d/780bf2c0-647d-11ea-bddc-5f310cab17d0/file-1qpq2yck7oylnfx-500w.jpg)

Accepted Answer

for no emergence  
i $>$ C.
sin i $>$ sin C
$ \Rightarrow $ ${1 \over {\sqrt 2 }} > {1 \over \mu }$
$ \Rightarrow $ $\mu  > \sqrt 2 $ = 1.414
As $\mu $
red
(= 1.39)  $\mu $ (= 1.414), so only red colour will be transmitted through face AC while green and blue colours will suffer total internal reflection.
So the prism will separate red colour from the green and blue colours.
![](https://neetcare-image.cdn.examgoal.net/1qpq2yck7oz90zv/30552b5e-1151-4dbe-8d45-672cd8d85889/0220b1b0-6480-11ea-bddc-5f310cab17d0/file-1qpq2yck7oz90zw-329w.jpg)

Answer

not separate the three colours at all

Answer

separate the red colour part from the green and blue colours

Answer

separate the blue colour part from the red and green colours

Answer

separate all the three colours from one another

Ray Optics

A beam of light consisting of red, green and blue colours is incifent on a right angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. The prism will

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