Modern Physics ...

The de-Broglie wavelength associated with a proton moving with a velocity, equal to 1/20 th of the velocity of light

An electron has been accelerated from rest through a potential difference of 100V, its de-Broglie wavelength is

The experiments of Frank and Hertz showed that

A photon and an electron have same energy, the ratio of their wavelengths is

If the wavelength of incident light changes from 400nm to 300nm, the stopping potential for photoelectrons emitted from a surface becomes approximately

The photosensitive surface is receiving light of wavelength 5000Å at the rate of 10^-8 Js^-1. The number of photons received per second, is

The wavelength of quantum of radiant energy emitted, if an electron transmitted into radiation and converted into one quantum, is

The electric potential at the surface of an atomic nucleus (Z=50) of radius 9.0 x 10^-13 cm, is

Kα wavelength emitted by an atom of atomic number Z=11 is λ. Find the atomic number for an atom that emits Kα radiation with wavelength 4λ, is

The ratio of minimum wavelengths of Lyman and Balmer series will be