Photon Theory of Light

If the energy of a photon is given as, $\text{E}=3.03\times {10}^{-19} \mathrm{J}$, then, the wavelength $\mathrm{(\lambda )}$ of the photon is

What are the uses of Compton effect?

What does Compton effect prove?

What does the Compton effect mean?

What is the equation of Compton Effect?

What is Compton effect?
 

What are the basic concepts of sampling and quantization?

What is the concept of quantization?

Special theory of relativity deals with the events in the frames of reference which move with constant

The energy $E$ and momentum $p$ of photon is given by $E=h\nu$ and $p=\frac{h}{\lambda },$ the velocity of photon will be-

A $1.5 \mathrm{kW}$ (kilo-watt) laser beam of wavelength $6400 \mathrm{A}$ is used to levitate a thin aluminium disk of same area as the cross-section of the beam. The laser light is reflected by the aluminium disk without any absorption. The mass of the foil is close to,

An electron-positron pair (rest mass of each particle is $0.51\mathrm{MeV}$ ) is produced by a $\gamma$-ray photon of energy $2.42\mathrm{MeV}$. The K.E. imparted to each of the charged particles shall be-

Electron volt is the unit of

Define one electron volt.

A hydrogen atom with a velocity $V$ absorbs a photon of wavelength $1650 Å$ and stops. If the mass of hydrogen atom is $1.6\times {10}^{-27} \mathrm{kg}$, the value of $V$ is (use $h=6.6\times {10}^{-34} \mathrm{J}-\sec$)

Consider, sun is producing power $P$ in the form of monochromatic radiations of wavelength $\lambda$ and distance between sun and earth is $d.$ ($d>>$ earth radius). Calculate number of photon in cubic metre, just above the earth surface

The energy of photons in a beam whose wavelength is $6.20\times {10}^{-5} \mathrm{cm}$ is

Write a note on the nature of light and its role in photosynthesis.

Explaining the concept of photon describe its various properties.

A $20$ watt bulb is emitting light of frequency $5\times {10}^{14} \mathrm{Hz}$. Find the number of photons emitted by the bulb in one second.