The energy of emitted photoelectrons depends up on
1 Answers
Talk Doctor Online in Bissoy App
Calculate the kinetic energy of a photoelectron (in eV) emitted on shining light of wavelength `6.2 xx 10^(-6)m` on a metal surface. The work function
Correct Answer - 0.1 eV
2 Answers 2 views
If the speed of photoelectrons is `10^(4) ms^(-1)`, what should be the frequency of incident radiation on the potassium metal ? Work function of potas
Correct Answer - `5.56 xx 10^(14) Hz`
2 Answers 2 views
The photoelectric threshold wavelength for lithium is `8000 Å`. Find the maximum kinetic energy in eV of the emitted electrons from the surface by lig
Correct Answer - 0.5156 eV
2 Answers 1 views
The energy of photoelectrons emitted from a sensitive plate is 1.56 eV. If its threshold old wavelength is `2500 Å`, calculate the wavelength of incid
Correct Answer - `1379 Å`
2 Answers 1 views
The mercury line of wavelength `2356 Å` is used to eject photoelectrons from silver. The difference in potentials required to bring the electrons to r
Correct Answer - 4.77 eV
2 Answers 1 views
Calculate the energy of the hydrogen atom in the states n = 4 and n = 2. Determine the frequency and wavelength of the emitted radiation in a transiti
Correct Answer - `0.85 eV, 3.4 eV, 6.16 xx 10^(14) Hz, 4.87 xx 10^(-7)m`; yes
2 Answers 1 views
The energy of K-electron in tungsten is -20.0 keV and of an L-electron is -2.0 ke V. Find the wavelength of X-rays emitted when an electron jumps from
Correct Answer - 0.6875 Å
2 Answers 1 views
The energy of alpha particles emitted by `.^(210)Po` is 5.3 MeV. The half life of this alpha emitter is 138 days. (a) What mass of `.^(210)Po` is need
Correct Answer - [88.4 mg, 0.16 watt]
2 Answers 2 views
Energy emitted per second per unit area by Rigal star in Constellation Orion is 17000 times that emited by the sun. What is the surface temperature of
Correct Answer - `6.91xx10^(4)K`
2 Answers 1 views
An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what energy level did it jump? How many spectral lines may be emitted in the
Correct Answer - `n=3;` 1025 Å, 6563 Å; 1215 Å
2 Answers 1 views