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`        a light ray is incident on a transparent sphere of index root 2 at an angle of incidence =45 o . what is the deviation of a tiny fraction of ray which enters sphere undergoes two internal reflections and then refracts out into air`
one year ago

## Answers : (1)

Vikas TU
11137 Points
```							At first surface apply the Snell's law, n1*sint(thetha1) = n2*sin(thetha2)root2*sinthetha2 = 1/root(2) thetha2 = 30 degree.The refrcting angle that is r = 30 degree. Also from TIR concept, r = r' = 30° Apply the Snell's law again at second surface we get,e = 45° Deviation at the first surface= i - r = 45° - 30° = 15° Deviation at 2nd surface = e - r = 45° - 30° = 15° Total Deviation = 15° + 15° = 30°(total deviateion always gets add up)
```
one year ago
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