KCET · Physics · Ray Optics
White light is incident normally on a glass slab. Inside the glass slab,
- A all colours travel with the same speed
- B red light travels faster than other colours
- C violet light travels faster than other colours
- D yellow light travels faster than other colours
Answer & Solution
Correct Answer
(B) red light travels faster than other colours
Step-by-step Solution
Detailed explanation
Refractive index is least for red colour (by Cauchy's formula, hence speed of red light is maximum in glass.
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
- The most stable particle in the Baryon group isKCET 2012 Easy
- The maximum particle velocity in a wave motion is half the wave velocity. Then the amplitude of the wave is equal toKCET 2007 Easy
- How many times more intense is a \(60 \mathrm{~dB}\) sound than a \(30 \mathrm{~dB}\) sound?KCET 2008 Easy
- In Young's double slit experiment the source is white light. One slit is covered with red filter and
the other with blue filter. There shall beKCET 2016 Easy - A parallel plate capacitor has a uniform electric field '\(E\)' in the space between the plates. If the distance between the plates is '\(d\)' and area of each plate is '\(A\)', the energy stored in the capacitor isKCET 2026 Easy
- A horizontal pipe carries water in a streamlined flow. At a point along the pipe, where the cross-sectional area is \(10 \mathrm{~cm}^{-2}\), the velocity of water is \(1 \mathrm{~ms}^{-1}\) and the pressure is 2000 Pa . What is the pressure of water at another point where the cross-sectional area is \(5 \mathrm{~cm}^2\) ?
[Density of water \(=1000 \mathrm{kgm}^{-3}\) ]KCET 2025 Medium
More PYQs from KCET
- Following is the substitution reaction in which \(-\mathrm{CN}\) replaces \(-\mathrm{Cl}\).
\(R-\mathrm{Cl}+\underset{\text { (alcoholic) }}{\mathrm{KCN}} \underset{\Delta}{\longrightarrow}-\mathrm{CN}+\mathrm{KCl}\)
To obtain propanenitrile, \(R-\mathrm{Cl}\) should beKCET 2011 Easy - Dimensional formula for the universal gravitational constant isKCET 2008 Easy
- \( \left[\mathrm{Fe}\left(\mathrm{NO}_{2}\right)_{3} \mathrm{Cl}_{3}\right] \) and \( \left[\mathrm{Fe}(\mathrm{O}-\mathrm{NO})_{} \mathrm{Cl}_{3}\right] \) showsKCET 2018 Easy
- In carbylamine test for primary amines the resulting foul smelling product isKCET 2022 Easy
- \(L C\)-oscillations are similar and analogous to the mechanical oscillations of a block attached to a spring. The electrical equivalent of the force constant of the spring isKCET 2021 Hard
- \(A\) and \(B\) are two metals with threshold frequencies \(1.8 \times 10^{14} \mathrm{~Hz}\) and \(2.2 \times 10^{14} \mathrm{~Hz}\). Two identical photons of energy \(0.825 \mathrm{eV}\) each are incident on them. Then photoelectrons are emitted by (Take \(h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) )KCET 2007 Medium