KCET · Physics · Ray Optics
The incorrect statement about refractive index for a pair of media is
- A It depends upon nature of the first medium.
- B It depends upon nature of the second medium.
- C It depends upon wavelength of light
- D It depends upon angle of incidence
Answer & Solution
Correct Answer
(D) It depends upon angle of incidence
Step-by-step Solution
Detailed explanation
The refractive index of a second medium with respect to a first medium is defined as the ratio of the speed of light in the first medium to the speed of light in the second medium, given by \(n_{21} = \dfrac{v_1}{v_2}\).
The speed of light in a medium depends on the optical properties (nature) of that medium and the wavelength of the light used (due to dispersion). Therefore, the refractive index for a pair of media depends on the nature of both the first and second media, as well as the wavelength of the light.
According to Snell's law, the ratio \(\dfrac{\sin i}{\sin r}\) is a constant for a given pair of media and a given wavelength of light. This constant is the refractive index, which remains independent of the angle of incidence.
Thus, the statement that refractive index depends upon the angle of incidence is incorrect.
Answer: It depends upon angle of incidence
The speed of light in a medium depends on the optical properties (nature) of that medium and the wavelength of the light used (due to dispersion). Therefore, the refractive index for a pair of media depends on the nature of both the first and second media, as well as the wavelength of the light.
According to Snell's law, the ratio \(\dfrac{\sin i}{\sin r}\) is a constant for a given pair of media and a given wavelength of light. This constant is the refractive index, which remains independent of the angle of incidence.
Thus, the statement that refractive index depends upon the angle of incidence is incorrect.
Answer: It depends upon angle of incidence
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 spherical conductor of radius \( 2 \mathrm{~cm} \) is uniformly charged with \( 3 \mathrm{nC} \). What is the electric field at a distance of \( 3 \mathrm{~cm} \) from the center of the sphere?KCET 2014 Medium
- A Point object is moving uniformly towards the pole of a concave mirror of focal length \( 25 \mathrm{~cm} \)
along its axis as shown below. The speed of the object is \( 1 \mathrm{~ms}^{-1} \). At \( \mathrm{t}=0 \), the distance of the
object from the mirror is \( 50 \mathrm{~cm} \). The average velocity of theimage formed by the mirror
between time \( t=0 \) and \( t=0.25 \mathrm{~s} \) is
KCET 2019 Easy - An aluminium sphere is dipped into water. Which of the following is true?KCET 2019 Medium
- In thermodynamic processes, which of the following statements is not true?KCET 2026 Easy
- A 30 cm long capillary tube is dipped in water, water rises upto a height of \(10\) cm due to capillarity. If this experiment is conducted in a freely falling water in an elevator, then the length of the water column becomesKCET 2026 Medium
- A block of mass \(m\) is connected to a light spring of force constant \(k\). The system is placed inside a damping medium of damping constant \(b\). The instantaneous values of displacement, acceleration and energy of the block are \(x, a\) and \(E\) respectively. The initial amplitude of oscillation is \(A\) and \(\omega^{\prime}\) is the angular frequency of oscillations. The incorrect
expression related to the damped oscillations isKCET 2023 Easy
More PYQs from KCET
- The system of equations \(4 x+6 y=5\) and \(8 x+12 y=10\) hasKCET 2025 Easy
- Red light of wavelength \(625 \mathrm{~nm}\) is incident normally on an optical diffraction grating with \(2 \times 10^{5}\) lines \(/ \mathrm{m}\). Including central principal maxima, how many maxima may be observed on a screen which is far from the grating?KCET 2010 Hard
- Which of the following is genetically dominant trait in human beings?KCET 2005 Easy
- In Young's double slit experiment, slits are separated by \( 2 \mathrm{~mm} \) and the screen is placed at a
distance of \( 1.2 \mathrm{~m} \) from the slits. Light consisting of two wavelengths \( 6500 Å \) and \( 5200 Å \) are
used to obtain interference fringes. Then the separation between the fourth bright fringes of
two different patterns produced by the two wavelengths isKCET 2018 Hard - Tertiary alkyl halide is practically to substitution by \( S_{N} 2 \) mechanism because ofKCET 2018 Easy
- Two bodies with kinetic energies in the ratio of \(3:1\) are moving with equal linear momentum. The ratio of their masses isKCET 2026 Easy