A beam of electrons with kinetic energy K₁ is incident on a single slit of width a. After passing through the slit, the beam strikes a screen where it is made visible. At the center of the screen directly in front of the slit, the intensity of the pattern on the screen is I₁. If the kinetic energy of the beam is increased (keeping the slit width and the number of electrons per second constant), does the intensity of the pattern at the center of the screen increase, decrease, or remain the same?

When ultraviolet light with a wavelength of 400.0 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.10 eV. (a) What is the work function of the metal surface? (b) What is the maximum kinetic energy of the photoelectrons when light of wavelength 300.0 nm falls on the same surface?

Light of wavelength 340 nm, 600 nm and 680 nm is incident on a metal. Electrons are not emitted from the metal, which of the following is the most likely scenario.     The energy of the photon for 600 nm light corresponds to the work function of the material.     The energy of the photon for 680 nm light corresponds to the work function of the material.     The work function is less than any of these photon energies.     The work function is more than any of these photon energies.     The energy of the photon for 340 nm light corresponds to the work function of the material.

X-rays are scattered from a target at an angle of 54.9° with respect to the direction of the incident beam. What is the wavelength shift (in m) of the scattered x-rays?  What If? For what scattering angle (in degrees) will the wavelength shift of x-rays be exactly double that found in part (a)?