4.2 What minimum frequency of light is required to produce photoelectrons from rubidium, with a work function of 2.2608 eV?

13.

For photons of energy 8.00 eV, what stopping potential would be required to arrest the current of photoelectrons?

Electrons in a photoelectric-effect experiment emerge from an aluminum surface with a maximum KE 1.30 eV. What is the wavelength of the incident light in nm? [hc = 1240 nm.eV] [Work function of Al = 4.28 eV] Photo-electrons are observed when a metal is illuminated with light of wavelength less than 388 nm. What is the metal's work-function?

An X-ray photon moving along the x-direction is scattered by a stationary electron. The initial frequency of the photon is fi = 8 x 10t° Hz and the final frequency is fr = been scattered. In other words finesthe angle 0 that the outgoing photon makes with respect to the x-axis. Give your answer in degrees to 3 significant figures. Sketch a diagram showing the directions of the initial and final momenta. 7.75 x 1018 Hz. Find the direction of the photon's momentum after it has

The work function of a certain metal is found to be 1.82 ev. What is the stopping potential required to to stop the current in a photoelectric effect experiment if the wavelength of the incident light is 452 nm. Round your answer to 3 significant figures. Add your answer

temperature nm inside a cavity of volume 100cm³ when the is 25 °C. Hint: make a rectangular approximation of the integral. 13. Demonstrate that the Planck distribution reduces to the Rayleigh- Jeans law at long wavelengths. ical coordinates. 14. Normalize the following wavefunction: rez in 3-D space using spher- 15 si muis illises

1) A laser produces light of wavelength 525 nmnm in an ultrashort pulse. What is the minimum duration of the pulse if the minimum uncertainty in the energy of the photons is 1.0%%? Express your answer with the appropriate units.