Which of the following event, support the quantum nature of light?

According to photon theory of light which of the following physical quantities associated with a photon do not/does not change as it collides with an electron in vacuum

When monochromatic radiation of intensity $I$ falls on a metal surface, the number of photoelectron and their maximum kinetic energy are $N$ and $T$ respectively. If the intensity of radiation is $2I,$ the number of emitted electrons and their maximum kinetic energy are respectively

When yellow light is incident on a surface, no electrons are emitted while green light can emit. If red light is incident on the surface, then

In Lenard's experiment, if the intensity of the incident light is doubled while keeping the frequency constant, what will be the effect on the stopping potential?

If a cathode ray tube has a potential difference $V$ volt between the cathode and anode, then the speed $v$ of cathode rays is given by

If the energy of photons corresponding to the wavelength of 6000$\mathop A\limits^ \circ$ is $3.2 imes {10^{ - 19}}$ J, the photon energy for a wavelength of 4000$\mathop A\limits^ \circ$ will be

A monochromatic light source of wavelength 500 nm emits $5 imes 10^{-3}$ W of power. Determine the average number of photons emitted per second. (Use $h = 6.6 imes 10^{-34}$ Js)

In Lenard's experiment, a metal with a work function of 2.0 eV is illuminated by light of frequency $6 imes 10^{14}$ Hz. What is the kinetic energy of the emitted photoelectrons? (h = $6.63 imes 10^{-34}$ Js)

When ultraviolet radiation is incident on a surface, no photoelectrons are emitted. If a second beam causes photoelectrons to be ejected, it may consist of

When yellow light is incident on a surface, no electrons are emitted while green light can emit. If red light is incident on the surface, then