COMEDK · Physics · 26. Wave Optics
If \(\theta\) is the polarising angle for a medium in which the speed of light is \(v\), then according to
Brewster's law
- A \(\theta=\sin ^{-1}(c / v)\)
- B \(\theta=\tan ^{-1}(c / v)\)
- C \(\theta=\cos ^{-1}(c / v)\)
- D \(\theta=\sin ^{-1}(v / c)\)
Answer & Solution
Correct Answer
(B) \(\theta=\tan ^{-1}(c / v)\)
Step-by-step Solution
Detailed explanation
According to Brewster's law, \[ \mu=\tan \theta_{p} \] where, \(\mu=\) refractive index \(=\frac{c}{v}\) and \(\theta_{P}=\) polarising angle \(=\theta\) \(\therefore \quad \theta=\tan ^{-1} \mu=\tan ^{-1}\left(\frac{c}{v}\right)\)
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
- Joule second is the unit ofCOMEDK 2024 Easy
- In an experiment to determine the period of a simple pendulum of length 100 cm , it is attached to different spherical bobs have uniform mass distribution. If the relative difference in the periods is found to be \(5 \times 10^{-4} \mathrm{~s}\), the difference in radii \(\left|r_1-r_2\right|\) is best given byCOMEDK 2024 Easy
- A nucleus of uranium-235 absorbs a slow neutron and undergoes nuclear fission according to the reaction: \({}^{235}_{92}U + {}^{1}_{0}n \rightarrow {}^{141}_{56}Ba + {}^{92}_{36}Kr + 3{}^{1}_{0}n + Q\)
If the average energy released per fission is 202 MeV, the energy released when 2.35 g of \(U^{235}\) undergoes complete fission is approximately;
[Given \(1eV = 1.6 \times 10^{-19}\ J\), Avogadro number \(= 6.02 \times 10^{23}\)]COMEDK 2026 Medium - Calculate the vapour pressure that can help the formation of a spherical droplet of water of radius \(6.25 \times 10^{-5}\) m at 22°C. Given: The surface tension of water at the given temperature is \(7.28 \times 10^{-2}\) Nm\(^{-1}\).COMEDK 2026 Easy
- A mass \(M\) is suspended from a light spring. An additional mass \(m\) added displaces the spring further by a distance \(X\). Now, the combined mass will oscillate on the spring with periodCOMEDK 2015 Hard
- A ray of light is travelling from glass of refractive index \(\dfrac{3}{2}\) to water of refractive index \(\dfrac{4}{3}\). What is the minimum angle of incidence for which no light enters in to the water?COMEDK 2025 Easy
More PYQs from COMEDK
- Doping of silicon (Si) with indium (In) leads to the formation ofCOMEDK 2022 Easy
- The remainder when \(7^{103}\) is divided by \(25\) isCOMEDK 2026 Medium
- A body of mass \(1000 \mathrm{~kg}\) is moving horizontally with a velocity \(50 \mathrm{~m} / \mathrm{s}\). A mass of \(250 \mathrm{~kg}\) is added. Find the final velocity.COMEDK 2020 Easy
- Choose the statements which are incorrect in the case of Lanthanoids.
A. \(\mathrm{Ce}^{4+}\) is diamagnetic while \(\mathrm{Sm}^{3+}\) is paramagnetic.
B. The atomic size of the transition metals having atomic number greater than 71 are very close to that of the elements above them.
C. Lanthanoids react with hot water forming water soluble \(\mathrm{Ln}(\mathrm{OH})_3\) with the liberation of \(\mathrm{O}_2\).
D. The general electronic configuration of Lanthanoids is \((n-2) f^{1-14} 5 d^0 6 s^2\), where \(n=6\).COMEDK 2025 Medium - The value of \(\cot 2 x \cot x-\cot 3 x \cot 2 x\)COMEDK 2017 Medium
- Mean life of a radioactive sample is \(100 \mathrm{~s}\). Then, its half-life (in min) isCOMEDK 2017 Easy