A ray of light originates from inside a glass slab and is incident on its inner surface at an angle θ as shown below. In this experiment, the location x of the spot where the ray hits the screen is recorded. Which of the following correctly shows the plot of variation of x with the angle θ ?

Question

A ray of light originates from inside a glass slab and is incident on its inner surface at an angle θ as shown below.

In this experiment, the location x of the spot where the ray hits the screen is recorded. Which of the following correctly shows the plot of variation of x with the angle θ ?

(A) A (B) B (C) C (D) D

Tardigrade Admin · Accepted Answer

As θ increases, angle of incidence (j = 90 - θ) decreases. Initially upto i = ic angle of critical incidence, reflection takes place and x is positive. Also, x increases till θ is such that i = ic, after that refraction takes place and x becomes negative <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/c8ba93b9bf00e032f1caf6f8c1889221-.jpeg" />

Q. A ray of light originates from inside a glass slab and is incident on its inner surface at an angle θ as shown below. In this experiment, the location x of the spot where the ray hits the screen is recorded. Which of the following correctly shows the plot of variation of x with the angle θ ?

A

B

C

D

As θ increases, angle of incidence (j=90−θ) decreases. Initially upto i=ic​ angle of critical incidence, reflection takes place and x is positive. Also, x increases till θ is such that i=ic​, after that refraction takes place and x becomes negative

As $θ$ increases, angle of incidence $(j = 90 - θ)$ decreases. Initially upto $i = i_{c}$ angle of critical incidence, reflection takes place and x is positive. Also, x increases till $θ$ is such that $i = i_{c},$ after that refraction takes place and x becomes negative