WBJEE · Physics · Ray Optics
A ray of light is incident on a right angled isosceles prism parallel to its base as shown in the figure. Refractive index of the material of the prism is \(\sqrt{2}\). Then. which of the following statement(s) is/are true? 
- A The refiection at \(P\) is total internal.
- B The reflection at \(Q\) is total internal.
- C The ray emerging at \(R\) is parallel to the ray incident at \(S .\)
- D Total deviation of the ray is \(150^{\circ}\)
Answer & Solution
Correct Answer
(C) The ray emerging at \(R\) is parallel to the ray incident at \(S .\)
Step-by-step Solution
Detailed explanation
Critical angle \(\theta_{C}=\sin ^{-1}\left(\frac{1}{\sqrt{2}}\right)=45^{\circ}\) Snell's law at points, \(\left(\because n_{1} \sin \theta_{1}=n_{2} \sin \theta_{2}\right)\) \(1 \sin 45^{\circ}=\sqrt{2} \sin \theta\) \(\therefore \quad \theta=30^{\circ}\) At \(P \because\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A progressive wave moving along \(x\) -axis is represented by \(y=A \sin \left[\frac{2 \pi}{\lambda}(v t-x)\right]\) The
wavelength \((\lambda)\) at which the maximum particle velocity is 3 times the wave velocity isWBJEE 2012 Medium - To write the decimal number 37 in binary, how many binary digits are required?WBJEE 2009 Hard
- \[
\text { The reading of the ammeter in the following figure will be }
\]
WBJEE 2010 Easy - Two thin lenses of focal lengths \(20 \mathrm{~cm}\) and \(25 \mathrm{~cm}\) are placed in cotact. The effective power of the combination isWBJEE 2011 Easy
- What is the phase difference between two simple harmonic motions represented by \(x_{1}=A \sin \left(\omega t+\frac{\pi}{6}\right)\) and \(x_{2}=A \cos (\omega t) ?\)WBJEE 2012 Easy
-
Consider a pure inductive A.C. circuit as shown in the figure. If the average powr consumed is \(P\), thenWBJEE 2021 Easy
More PYQs from WBJEE
- A satellite of mass m rotates round the earth in a circular orbit of radius R. If the angular momentum of the satellite
is J, then its kinetic energy (K) and the total energy (E) of the satellite areWBJEE 2024 Easy - The co-ordinates of the foot of the perpendicular from \((0,0)\) upon the line \(x+y=2\) areWBJEE 2009 Medium
- An element \(E\) loses one \(\alpha\) and two \(\beta\) particle in three successive stages. The resultibg element will beWBJEE 2016 Medium
- A ray of light is reflected by a plane mirror. \(\hat{e}_{0}, \hat{e}\) and \(\hat{n}\) be the unit vectors along the incident ray, reflected ray and the normal to the reflecting surface respectively. Which of the following gives an expression for ê?
WBJEE 2019 Medium - The integrating factor of the differential equation \(\left(1+x^{2}\right) \frac{d y}{d x}+y=e^{\tan ^{-1} x}\) isWBJEE 2014 Medium
- Let \(\alpha, \beta\) denote the cube roots of unity other than 1 and \(\alpha \neq \beta .\) Let \(S=\sum_{n=0}^{\infty}(-1)^{n}\left(\frac{\alpha}{\beta}\right)^{n} .\) Then the value of \(S\) isWBJEE 2014 Medium