MCQ
A photon in motion has a mass
- A$c/h\nu $
- B$h/\nu $
- C$h\nu $
- ✓$h\nu /{c^2}$
✓
Answer
Correct option: D.
$h\nu /{c^2}$
d
(d)$E = h\nu = m{c^2}\, \Rightarrow \,\,m = \frac{{h\nu }}{{{c^2}}}$
(d)$E = h\nu = m{c^2}\, \Rightarrow \,\,m = \frac{{h\nu }}{{{c^2}}}$
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
Activity of a radioactive sample decreases to $(1/3)^{rd}$ of its original value in $3\, days$. Then, in $9\, days$ its activity will become
→The $AC$ voltage across a resistance can be measured using:
→Different combination of $3$ resistors of equal resistance $R$ are shown in the figures.
The increasing order for power dissipation is:
→The increasing order for power dissipation is:
A beam of light from a source $L$ is incident normally on a plane mirror fixed at a certain distance $x$ from the source. The beam is reflected back as a spot on a scale placed just above the source $L.$ When the mirror is rotated through a small angle $\theta$, the spot of the light is found to move through a distance $y$ on the scale. The angle $\theta$ is given by
→An electric dipole in a uniform electric field experiences (When it is placed at an angle θ with the field)
Two electrons in an atom are moving in orbit of radii $R$ and $9R$ respectively. The ratio of their frequencies will be:
→Coulomb's Law agrees with $........$?
→The energy stored in a condenser of capacity $C$ which has been raised to a potential $V$ is given by
→A point source of light is placed in front of a plane mirror:
A point charge $ + q$ is placed at the centre of a cube of side $L$. The electric flux emerging from the cube is
→