Compton effect supports that
$X$-rays are transverse waves
$X$-rays have high frequency compared to visible light
$X$-rays can easily penetrate matter
Photons have momentum
What is velocity of photon ?
In photoelectric effect, if a weak intensity radiation instead of strong intensity of suitable frequency is used then
The number of photons emitted by a $10\,watt$ bulb in $10\,second,$ if wavelength of light is $1000\,\,\mathop A\limits^o ,$ is
Ultraviolet light of wavelength $300 \ nm$ and intensity $1.0 \ watt/m^2$ falls on the surface of a photosensitive material. If $1\%$ of the incident photons produce photoelectrons, then the number of photoelectrons emitted from an area of $1.0\ cm^2$ of the surface is nearly
If the momentum of a photon is $p$, then its frequency is
Where $m$ is the rest mass of the photon