How many photons are emitted by a laser source of $5 \times 10^{-3} \,W$ operating at $632.2 \,nm$ in $2 \,s$ is .......$\times 10^{16}$ $\left(h=6.63 \times 10^{-34} \,Js \right)$

  • A

    $3.2$

  • B

    $1.6$

  • C

    $4$

  • D

    $0.4$

Similar Questions

According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is

  • [AIPMT 1996]

Wavelength of a $1 \;keV$ photon is $1.24 \times {10^{ - 9}}\;m$. What is the frequency of $1 \;MeV$ photon

  • [AIPMT 1991]

Assertion : The phtoelectrons produced by a monochromatic light beam incident on a metal surface have a spread in their kinetic energies.
Reason : The work function of the metal is its characteristics property.

  • [AIIMS 2017]

Which of the following is dependent on the intensity of incident radiation in a photoelectric experiment

  • [AIIMS 1998]

Which one of these is non-divisible