The kinetic energy of an electron, which is accelerated in the potential difference of 100 V, is

In a photoelectric experiment, if both the intensity and frequency of the incident light are doubled, then the saturation photoelectric current

Lenard's experiment confirmed which aspect of Einstein's explanation of the photoelectric effect?

Particle nature and wave nature of electromagnetic waves and electrons can be shown by

Two different metals M1 and M2 have work functions $\phi_1$ and $\phi_2$ respectively, where $\phi_1 > \phi_2$. If both metals are illuminated with light of the same frequency $

u$, such that$h

u > \phi_1$, which metal will exhibit a larger stopping potential?

A metal surface is illuminated by a light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one-fourth of its original value, then the maximum kinetic energy of the emitted photoelectrons would become

If the work function of a photometal is $6.825\;eV.$ Its threshold wavelength will be $\left( {c = 3 imes {{10}^8}\;m/s} \right)$

Cathode rays are

A laser pointer emits monochromatic light at a wavelength of 650 nm with a power output of 1 mW. How many photons are emitted by the laser per second? (Planck's constant $h = 6.6 imes 10^{-34}$ Js)

Ultraviolet radiation of 6.2eV falls on an aluminium surface (work function 4.2eV). The kinetic energy in joule of the fastest electron emitted is approximately

Which apparatus did Lenard use to measure the kinetic energy of the emitted photoelectrons?