The maximum kinetic energy of electron if wavelenght of incident electromagnetic wave is `260 nm` and cut-off wvelenght is `380 nm` given `hc-1237nm-eV` is
Calculate the kinetic energy of the electron having wavelength 1 nm.
The photoelectric threshold wavelength of a metal is 300 nm. The maximum kinetic energy of electrons ejected from the metal surface by ultraviolet light of wavelength 250 nm is nearly (h = 4.14*10^-15 eV s and c= 3*10^8 ms^-1)
When monochromatic light of wavelength 620 nm is used to illuminate a metallic surface, the maximum kinetic energy of photoelectrons emitted is 1 eV. Find the maximum kinetic energy of photoelectron emitted (in eV) if a wavelength of 155 nm is used on the same metallic surface. (hc = 1240 eV-nm)
The maximum kinetic energy of the photoelectrons ejected from a photocathode when it is irradiated with light of wavelength 440nm is 1eV. If the threshold energy of the surface is 1.9eV, then which of the following statement is/are incorrect?
Derive an expression for the total energy of electron in n^(th) Bohr orbit. Hence show that energy of the electron is inversely proportional to the square of principal quantum number. Also define binding energy. The photoelectric threshold wavelength of a metal is is 230nm . Determine the maximum kinetic energy in joule and in eV of the ejected electron for the metal surface when it is exposed to a radiation of wavelength 180nm . [Plank's constant: h=6.63xx10^(-34)Js , Velocity of light: c=3xx10^(8)m//s ]
Suppose the energy liberated in the in the recombination of a hole-electron pair is converted into electromagnetic radiation.If the maximum wavelength emmited is 820nm,What is the band gap?
