MCQ
Electromagnetic radiation of frequency $n,$ wavelength $\lambda $, travelling with velocity $v$ in air, enters a glass slab of refractive index $\mu $. The frequency, wavelength and velocity of light in the glass slab will be respectively
  • A
    $\frac{n}{\mu }\,,\,\frac{\lambda }{\mu },\,\frac{v}{\mu }$
  • $n,\frac{\lambda }{\mu },\frac{v}{\mu }$
  • C
    $n\,,\,\lambda \,,\,\frac{{\rm{v}}}{\mu }$
  • D
    $\frac{n}{\mu }\,,\,\,$$\frac{\lambda }{\mu }\,,\,v$

Answer

Correct option: B.
$n,\frac{\lambda }{\mu },\frac{v}{\mu }$
b
(b) Frequency does not change with medium but wavelength and velocity decrease with the increase in refractive index.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

At a specific instant emission of radioactive compound is deflected in a magnetic field. The compound can emit

$(i)$ Electrons              $(ii)$ Protons                 $(iii)$ $H{e^{2 + }}$                  $(iv)$ Neutrons

The emission at the instant can be

Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium $M_1=4\ g$ and that of hydrogen $M_2=2\ g$ If the internal energy of He sample of $100\,\,J$ and that of the hydrogen sample is $200\,\,J$, then the internal energy of the mixture is ..... $J$
In a heat engine, the temperature of the source and sink are $500\, K$ and $375\, K$. If the engine consumes $25\times10^5\, J$ per cycle, the work done per cycle is
When the body has the same temperature as that of surroundings
If $V$ be the accelerating voltage, then the maximum frequency of continuous $X-$ rays is given by
The sun (diameter $d$) subtends an angle $\theta$ radian at the pole of a concave mirror of focal length $f$ . What is the diameter of the image of the sun formed by the mirror ?
Find Temperature difference between $B$ and $C$ ? (All rods are identical)
A positive charge $q$ is placed in a spherical cavity made in a positively charged sphere. The centres of sphere and cavity are displaced by a small distance $\vec l $ . Force on charge $q$ is :
A stone tied to a string is rotated in a circle. If the string is cut, the stone flies away from the circle because
The escape velocity of a body from earth is about $11.2 \,km / s$. Assuming the mass and radius of the earth to be about $81$ and $4$ times the mass and radius of the moon, the escape velocity in $km / s$ from the surface of the moon will be .......