Photoelectric threshold wavelength of Tungsten is `2730overset@ A`. Calculate its work function in electron volts. (`C = 3 xx 10^8 m//Sec., h = 6.63 xx 10^-34 Js`)

The threshold wavelength for silver is 3800overset@ A .Calculate the photoelectric work function for silver in eV.

The longest wavelength that can eject photo electrons from pt is 1950overset@A . Calculate its work function in electron volt.

The photoelectric work function of tungsten is 4.5 eV. Calculate its threshold wavelength.

The threshold wavelength for silver is 3800overset@ A . Calculate maximum kinetic energy in eV of photoelectrons emitted when ultraviolet light of wavelength 2600overset@ A falls on it. Also calculate stopping potential ( 1 eV = 1.6 xx 10^-19 J , Planck's constant = h = 6.63 xx 10^-34 Js , speed of light in vacuum = 3 xx 10^8 m//s ).

The energy of an electron in an excited state of hydrogen atom is -1.51 eV . Calculate the angular momentum of the electron in this state. h = 6.63 xx 10^-34 Js

If a light of wavelength 5000overset@ A is incident on a metal surface of work function 6 eV, emission of photoelectrons is possible or not? [h = 6.63 xx 10^-34 J-S, C = 3 xx 10^8 m//sec] .

Photoelectric work function of photosensitive material is 3 eV. Calculate threshold frequency and threshold wavelength

The threshold wavelength of tungsten is 2.76 xx 10^-5 cm : Explain why no photoelectrons are emitted when the wavelength is more than 2.76 xx 10^5 cm .