A pulse of light of duration $100 \ ns$ is absorbed completely by a small object initially at rest. Power of the pulse is $30 \ mV$ and the speed of light is $3 \times 10 ^8\ ms ^{-1}$. The final momentum of the object is :

  • [IIT 2013]
  • A

    $0.3 \times 10^{-17} \ kg ms ^{-1}$

  • B

    $1.0 \times 10^{-17} \ kg ms ^{-1}$

  • C

    $3.0 \times 10^{-17} \ kg ms ^{-1}$

  • D

    $9.0 \times 10^{-17} \ kg ms ^{-1}$

Similar Questions

Frequency of photon having energy $66 eV$ is

Momentum of a photon of wavelength $\lambda$ is

  • [AIPMT 1993]

The velocity of photon is proportional to (where $v$ is frequency)

In photo electric effect

$A.$ The photocurrent is proportional to the intensity of the incident radiation.

$B.$ Maximum Kinetic energy with which photoelectrons are emitted depends on the intensity of incident light.

$C.$ Max. $K.E$ with which photoelectrons are emitted depends on the frequency of incident light.

$D.$ The emission of photoelectrons require a minimum threshold intensity of incident radiation.

$E.$ Max. K.E of the photoelectrons is independent of the frequency of the incident light.

Choose the correct answer from the options given below:

  • [JEE MAIN 2023]

If we express the energy of a photon in $KeV$ and the wavelength in angstroms, then energy of a photon can be calculated from the relation