MHT CET · Physics · Ray Optics
A ray of light travelling through rarer medium is incident at a very small angle 'i' on a glass slab and after refraction its velocity is reduced by \(20 \%\). The angle of deviation is
- A \(\frac{\mathrm{i}}{5}\)
- B \(\frac{\mathrm{i}}{8}\)
- C \(\frac{\mathrm{i}}{4}\)
- D \(\frac{\mathrm{i}}{2}\)
Answer & Solution
Correct Answer
(A) \(\frac{\mathrm{i}}{5}\)
Step-by-step Solution
Detailed explanation
\(n_2 = \frac{v_1}{v_2} = \frac{v_1}{0.8v_1} = 1.25\) \(n_1 \sin i = n_2 \sin r \implies 1 \cdot i = 1.25 r\)
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
- An electron moves in a circular orbit with uniform speed ' \(v^{\prime}\). It produces a
magnetic field 'B' at the centre of the circle. The radius of the circle is
\(\left[\mu_{0}=\right.\) permeability of free space, \(\mathrm{e}=\) electronic charge \(]\)MHT CET 2020 Easy - The ratio of wavelengths for transition of electrons from \(2^{\text {nd }}\) orbit to \(1^{\text {st }}\) orbit of Helium \(\left(\mathrm{He}^{++}\right)\)and Lithium \(\left(\mathrm{Li}^{++}\right)\)is (Atomic number of Helium \(=2\), Atomic number of Lithium = 3)MHT CET 2023 Easy
- In air, a charged soap bubble of radius ‘ ’ breaks into small soap bubbles of equal radius ‘ ’. Then, the ratio of mechanical force acting per unit area of big soap bubble to that of a small soap bubble isMHT CET 2019 Medium
- The voltage between the plates of a parallel plate capacitor of capacity \(1 \mu \mathrm{~F}\) is changing at the rate of \(4 \mathrm{~V} / \mathrm{s}\). the displacement current in the capacitor isMHT CET 2025 Medium
- A mass ' \(M\) ' is suspended by a rope from a rigid support at point ' \(P\) ' as shown in figure. Another rope is tied at end 'Q' and pulled horizontally with a force ' \(F\) '. If the rope makes an angle ' \(\theta\) ' with vertical then the tension in the string ' PQ ' is
MHT CET 2025 Medium - A small sphere oscillates simple harmonically in a watch glass whose radius of curvature is 1.6 m . The period of oscillation of the sphere in second is (acceleration due to gravity, \(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2\) )MHT CET 2024 Easy
More PYQs from MHT CET
- The general solution of the differential equation \(\left(3 x y+y^2\right) d x\) \(+\left(x^2+x y\right) d y=0\) isMHT CET 2021 Hard
- Stationary waves can be produced inMHT CET 2023 Easy
- What is the designation of an orbital with quantum numbers \(\mathrm{n}=4\) and \(l=3\) ?MHT CET 2024 Easy
- There are two metallic spheres of same radii but one is solid and other is hollow thenMHT CET 2022 Easy
- Isopropyl amine with excess of acetyl chloride will giveMHT CET 2007 Medium
- Water potential is same as ________.MHT CET 2025 Hard