CBSE Class 10 Answered
- A ray of light travels from water to glass. What will be the angle of refraction in glass if the angel of incidence in water is 20 degree? The refractive index of water is 1.33 and that of glass is 1.5.
- A ray of light falls on a transparent glass of refractive index 1.62. If the reflected ray and refracted ray are mutually perpendicular, what is the angle of incidence?
Asked by Sukrit Saha | 10 Dec, 2015, 08:24: PM
Expert Answer
2.
Let the incident ray MO fall on a transparent glass slab at the point of incidence O.
From the figure, OP and OR are reflected and refracted rays. The reflected and refracted rays are mutually perpendicular.
Therefore,
i + 90º + r = 180º
i + r = 90º
or r = 90º - i
From Snell's law,
Note: Kindly ask the other question as a separate query.
Answered by Faiza Lambe | 11 Dec, 2015, 08:14: AM
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