The figure shows a transparent block of side | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) For total internal reflection to occur at the surface,the angle of incidence must be greater than or equal to the critical angle $	heta_c$.Given

Vedclass · Accepted Answer

Vedclass · Answer

(D) For total internal reflection to occur at the surface,the angle of incidence must be greater than or equal to the critical angle $	heta_c$.Given the refractive index $\mu = 2$,the critical angle $	heta_c$ is calculated as:$\sin 	heta_c = \frac{1}{\mu} = \frac{1}{2}$$	heta_c = 30^{\circ}$To ensure no light passes through the segment $AB$,any light ray originating from the source $S$ and striking the surface $AB$ must have an angle of incidence greater than or equal to $	heta_c = 30^{\circ}$.This implies that the source $S$ must be located within a region such that the angle subtended by the segment $AB$ at $S$ is less than or equal to the critical angle,or more specifically,the rays reaching $AB$ from $S$ must strike at angles $\ge 	heta_c$. The shaded region in the diagrams represents the set of points where this condition is satisfied. Based on the geometry,the correct representation is given by option $D$.

Similar Questions

In an optical fibre, the core and cladding are made with materials of refractive indices $1.5$ and $1.414$ respectively. To observe total internal reflection, what will be the range of the incident angle with the axis of the optical fibre?

$A$ light ray is incident perpendicularly to one face of a $90^{\circ}$ prism and is totally internally reflected at the glass-air interface. If the angle of incidence at the interface is $45^{\circ}$,we conclude that the refractive index $n$ is:

The critical angle of light passing from glass to air is minimum for which wavelength?

$A$ point source of light is placed at a distance $h$ below the surface of a large deep lake. What is the percentage of light energy that escapes directly from the water surface if the refractive index $\mu$ of the water is $4/3$ (in $\%$)? (Neglect partial reflection)

Optical fibres are related with

Vedclass Test Series

Exam Paper Generator

Online Exam Module