Physics-
General
Easy
Question
A ray of light is incident at the glass-water interface at an angle I, it emerges finally parallel to the surface of water, then the value of 
g would be:
sin i
- l
sin i
The correct answer is:
Applying
Snell’s law (m sin I = constant)
at 1 and 2, we have
m1 sin i1= m2 sin i2
Here,m1 = mglass, i1 = I
m2 = mair = 1 and i2 = 90°
\ mg sin I = (1) (sin 90°)
or mg =
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