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Calculate the speed at which red light travels through acrylic Calculate the speed at which blue...

Calculate the speed at which red light travels through acrylic Calculate the speed at which blue light travels through acrylic.

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Answer #1

Acrylic has a refractive index of 1.49.

If 'c' is the velocity of light in vaccum, then velocity of light through a medium of refractive index 'k' is given by -

c' = c / k

so, speed of red light through acylic = c / 1.49 = (3 x 10^8) / 1.49 = 2.013 x 10^8 m/s

Speed of blue light through acrylic will also be the same as the red light because both the colour have the same velocity through vaccum.

Only refractive index of a medium affects the velocity of light.

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