When intensity of incident light increases

Cathode rays are

Light of frequency ${\rm{1}}{\rm{.5}}$ times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled ?

If a photon has velocity $c$ and frequency $v,$ then which of following represents its wavelength

The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is $\left( {hc\; = 1240\;eV - {\rm{nm}}} \right)$

A metal plate gets heated when cathode rays strike against it due to

The frequency and intensity of a light source are doubled. Consider the following statements

I. Saturation photocurrent remains almost the same.

II. Maximum kinetic energy of the photoelectrons is doubled.

A photosensitive material is illuminated with light of frequency $2.5

u_0$, where$

u_0$ is the threshold frequency. What will be the photoelectric current if the intensity of the incident light is reduced to half while the frequency remains the same?

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, ultraviolet light of wavelength 200 nm is incident on a metal surface. The stopping potential is found to be 4V. If the wavelength is increased to 300 nm, what will be the new stopping potential? (Take $h = 6.63 imes 10^{-34}$ Js, $c = 3 imes 10^8$ m/s, $e = 1.6 imes 10^{-19}$ C)

The ratio transmitter operates on a wavelength of 1500 m at a power of 400 kW. The energy of radio photon (in joule) is