Experiments are performed with ultracold neutrons having velocities of 5.14 m/s.   (a)What is the wavelength (in nm) of such a neutron?   nm   (b)What is its kinetic energy in eV?   eV

Light of constant intensity but varying wavelength was used to illuminate the cathode in a photoelectriceffect experiment. The graph shows how the stopping potential depended on the frequency of the light. What is the work function, in eV, of the cathode?

Suppose an argon laser emits 1.49 * 1019 photons per second,half with a wavelength of 488.0 nm and half with a wavelength of514.5 nm. What is the power output of this laser in watts?A. 1.49 W B. 5.76 WC. 5.92 W D. 6.07 W

Calculate the de Broglie wavelength for: a) An electron (9.11 x 10-31) moving at 1 x 106 m/s b) A neutron (1.67 x 10-27 kg) moving at 2.6 x 104 m/s Both particles approach a potential barrier (U = 5 eV) 0.26 nm wide. Calculate the transmittance coefficient for each particle. %3D