MCQ
The momentum of photon is :
  • A
    h
  • B
    hc
  • $\frac{ hv }{ c }$
  • D
    $\frac{ c }{ hv }$

Answer

Correct option: C.
$\frac{ hv }{ c }$
(C) - $\frac{ hv }{ c }$

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

A modulating signal is a square wave, as shown in the figure.
If the carrier wave is given as $c ( t )=2 \sin (8 \pi t )$ volts, the modulation index is:
The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 2 s. The magnet is cut along its length into three equal parts and three parts are then placed on each other with their like poles together. The time period of this combination will be
What ........$mm$ will be the height of image when an object of $2 \,mm$ is placed on the axis of a convex mirror at a distance $20 \,cm$ of radius of curvature $40 cm$
A metal wire of resistance $3\,\Omega $ is elongated to make a uniform wire of double its previous length. The new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle $60^o$ at the centre, the equivalent resistance between these two points will be
A photon of energy $8 eV$ is incident on a metal surface of threshold frequency $1.6 \times {10^{15}}\,Hz$, then the maximum kinetic energy of photoelectrons emitted is ............... $eV$ $(h = 6.6 \times {10^{ - 34}}\,Js)$
The voltage of $AC$ source varies with time according to the equation, $V = 100\, \sin 100\, \pi \, t \, \cos \,100\, \pi \,t$. Where $t$ is in second and $V$ is in volt. Then:-
Two circuits have coefficient of mutual induction of 0.09 henry. Average e.m.f. induced in the secondary by a change of current from 0 to 20 ampere in 0.006 second in the primary will be
A soap bubble is given negative charge, its radius will:
In hydrogen spectrum the wavelength of ${H_\alpha }$ line is $656 nm $ whereas in the spectrum of a distant galaxy, ${H_\alpha }$ line wavelength is $706 nm$ . Estimated speed of the galaxy with respect to earth is
A conducting ring of radius $R$ is placed in uniform inward magnetic field $\vec B$ as shown. If ring is moving with velocity $\vec v$ in its plane, the induced $emf$ across arc $PQ$ will be