GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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48.80
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49.10
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500
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510
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Detailed explanation-1: -Critical Angle can be described as the angle of incidence that offers an angle of refraction of 90 degrees. Remember that the critical angle is defined as an angle of incidence value. The critical angle will be 48.6 degrees for water-air boundaries and 61.0 degrees for crown glass-water boundary.
Detailed explanation-2: -The statement the critical angle for water is means if the light in water travels at an angle of incidence equal to it will come out in the air along the surface of the water.
Detailed explanation-3: -The refractive index of water with respect to air is 1.33 .
Detailed explanation-4: -The critical angle for water is measured between the beam and a line perpendicular to the surface, and is 49 degrees.