Momentum of a photon of wavelength $\lambda$ is
Momentum of a photon of wavelength $\lambda$ is
- [AIPMT 1993]
- A
$\frac{h}{\lambda }$
- B
Zero
- C
$\frac{{h\lambda }}{{{c^2}}}$
- D
$\frac{{h\lambda }}{c}$
Similar Questions
Threshold frequency for a metal is ${10^{15}}Hz$. Light of $\lambda = 4000{ \mathring A}$ falls on its surface. Which of the following statements is correct
Photo cells are used for the
Photo cells are used for the
Find the number of photons emitted per second by a $25$ watt source of monochromatic light of wavelength $6600 \mathring A$. What is the photoelectric current assuming $3 \%$ efficiency for photoelectric effect?
Find the number of photons emitted per second by a $25$ watt source of monochromatic light of wavelength $6600 \mathring A$. What is the photoelectric current assuming $3 \%$ efficiency for photoelectric effect?
Photon and electron are given same energy $({10^{ - 20}}J)$. Wavelength associated with photon and electron are ${\lambda _{Ph}}$ and ${\lambda _{el}}$ then correct statement will be
Photon and electron are given same energy $({10^{ - 20}}J)$. Wavelength associated with photon and electron are ${\lambda _{Ph}}$ and ${\lambda _{el}}$ then correct statement will be
Monochromatic light with a frequency well above the cutoff frequency is incident on the emitter in a photoelectric effect apparatus. The frequency of the light is then doubled while the intensity is kept constant. How does this affect the photoelectric current?
Monochromatic light with a frequency well above the cutoff frequency is incident on the emitter in a photoelectric effect apparatus. The frequency of the light is then doubled while the intensity is kept constant. How does this affect the photoelectric current?