CBSE Class 12-science Answered
A point source of monochromatic light S is kept at the centre of trhe bottom of A CYLINDER of radius 15cm.The cylinder contains water of refractive index 4/3 to a height of 7cm. Draw the ray diagram and calculate trhe area of water surface through which the light emerges in air.
Asked by vasturushi | 02 Feb, 2018, 06:47: PM
Expert Answer
if angle of incidence is equal to the critical angle,
no light is refracted back to air
the light will appear as if it is emerging from the circle with an angle theta from the vertical
let the radius of that circle be 'r', the area will therefore be,
refractive index of air with respect to water is 4/3
Answered by Abhijeet Mishra | 04 Feb, 2018, 04:09: PM
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