MCQ
Light of different colours propagates through air
- AWith the velocity of air
- BWith different velocities
- CWith the velocity of sound
- ✓Having the equal velocities
✓
Answer
Correct option: D.
Having the equal velocities
d
(d) In vacuum, the speed of light is independent of wave length.
(d) In vacuum, the speed of light is independent of wave length.
Thus vacuum (or air) is a non dispersive medium in which all colours travel with the same speed.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In a compound microscope, the focal length of two lenses are $1.5\,cm$ and $6.25\,cm$. If an object is placed at $2\,cm$ from objective and the final image is formed at $25\,cm$ from eye lens the distance between two lenses is......$cm$
→The electric field at $A$ due to dipole $p$ is perpendicular to $p.$ The angle $ \theta $ is :-
→In a series resonant $LCR$ circuit, the voltage across $R$ is $100 $ volts and $R = 1\ k\Omega$ with $C = 2\ μF$. The resonant frequency $\omega$ is $200\ rad/s$. At resonance the voltage across $L$ is
→The wave theory of light does not explain:
de$-$Broglie wavelength of a body of mass $1 \ kg$ moving with velocity of $2000 m/s$ is
→The critical angle between an equilateral prism and air is $45^o $. If the incident ray is perpendicular to the refracting surface, then
→When a current of $2\, A$ flows in a battery from negative to positive terminal, the potential difference across it is $12\, V$. If a current of $3\, A$ flowing in the opposite direction produces a potential difference of $15\, V$, the $emf$ of the battery is .............. $V$
→The resistance of a metal wire increases with increasing temperature on account of:
A message signal of frequency $5\,kHz$ is used to modulate a carrier signal of frequency $2\,MHz$. The bandwidth for amplitude modulation is $..........\,kHz$
→The magnetic field in a coil of 100 turns and 40 square cm area is increased from 1 Tesla to 6 Tesla in 2 second. The magnetic field is perpendicular to the coil. The e.m.f. generated in it is