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Geometrical Optics question

2019 · 12 Apr · Shift 2 · Q58
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Geometrical Optics question

2019 · 12 Apr · Shift 2 · Q58

JEE MainPhysicsGeometrical OpticsMCQ+4 / −1
A transparent cube of side, made of a material of refractive index μ\muμ 2, is immersed in a liquid of refractive index μ\muμ 1(μ\muμ 1 < μ\muμ 2). A ray is incident on the face AB at an angle θ\thetaθ(shown in the figure). Total internal reflection takes place at point E on the face BC. JEE Main 2019 (Online) 12th April Evening Slot Physics - Geometrical Optics Question 177 English Then θ\thetaθ must satisfy :
  1. A
    θ>sin⁡−1μ22μ12−1\theta \gt {\sin ^{ - 1}}\sqrt {{{\mu _2^2} \over {\mu _1^2}} - 1}θ>sin−1μ12​μ22​​−1​
  2. B
    θ<sin⁡−1μ22μ12−1\theta \lt {\sin ^{ - 1}}\sqrt {{{\mu _2^2} \over {\mu _1^2}} - 1}θ<sin−1μ12​μ22​​−1​
  3. C
    θ<sin⁡−1μ1μ2\theta \lt {\sin ^{ - 1}}{{{\mu _1}} \over {{\mu _2}}}θ<sin−1μ2​μ1​​
  4. D
    θ>sin⁡−1μ1μ2\theta \gt {\sin ^{ - 1}}{{{\mu _1}} \over {{\mu _2}}}θ>sin−1μ2​μ1​​
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