Multiple Choice QuestionsIf a ray of light is incident at a glass surface at the Brewster's angle of 60°, then the angle of deviation inside glass is
90°
60°
45°
30°
D.
30°
According to Brewster law, when a beam of unpolarised light is reflected from a transparent medium, the reflected light is completely plane polarised at a certain ofincidence, called angle of polarisation.
Given, Brewster's angle, θ = 60°
We know that, µ = tan θ ...... (i)
⇒ µ = tan 60° =
Now,
Angle of deviation inside the glass,
d = i − r = 60° − 30° = 30°
Identify the wrong sign convention.
The magnification for virtual image formed by a convex lens is positive.
The magnification for real image formed by a convex lens is negative
The magnification for virtual image formed by a concave lens is negative
The distances measured in the direction of incident light is positive
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