A beam of light consisting of red, green and blue colours is incident on a right-angled prism. The refractive index of the material of the prism for the above red, green and blue wavelength are 1.39, 1.44 nd 1.47

The Prism will

separate the blue colour part from the red and green colours

separate all the three colours from one another

not separate the three colours at all

separate the red colour part from the green and blue colours

Solution

separate the red colour part from the green and blue colours

For refractive index of a index.
$straight mu space equals space fraction numerator 1 over denominator sin space straight i subscript straight c end fraction space equals space fraction numerator 1 over denominator sin space 45 to the power of straight o end fraction space equals space square root of 2$

$straight mu subscript red space equals space 1.39 space comma space straight mu subscript green space equals space 1.44 space and space straight mu subscript blue space equals space 1.47 left parenthesis straight mu subscript red space equals space 1.39 right parenthesis space less than thin space straight mu comma space straight mu subscript green space end subscript greater than straight u subscript comma space straight mu subscript blue space greater than straight mu Thus comma space only space red space colour space do space not space suffer space total space internal space reflection.$

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