1) As part of an electron diffraction experiment, electrons are accelerated from rest across a potential difference of 100 V. The beam of electrons is then directed at a diffraction grating with 1000 lines/mm, and the resulting pattern is detected on a phosphorescent screen 0.25 m away from the grating.

In the first blank, identify the speed of the electrons, to three significant digits, as they reach the diffraction grating (in m/s)__Blank 1___

In the second blank, identify the wavelength of the electrons, to three significant digits, as they reach the diffraction grating (in m). ___Blank 2___

In the third blank, identify the distance at which one would observe the 2nd maxima on the screen, measured from the central maxima. Express your answer to three significant digits (in m). ___Blank 3___

2) Hypothetically if the 100W bulb only produced green light, and 10% of the energy consumed was used to produce green light (=500nm), the number of green photons produced each second is ___x1019 (Give your answer with 3 sig digs and do not include units

3) In a Compton scattering experiment, an X-ray photon that has a wavelength of 0.130 nm is incident on a free, initially stationary electron. The scattered X-ray photon, which has a wavelength of 0.135 nm, travels back the way the incident photon came.

What is the momentum of the free electron after the collision?

4) Light with a frequency of (1.5900x10^15) Hz hits a metal with a work function of (4.00x10^0) eV. Determine the maximum velocity of photoelectrons generated by this setup.

Express your answer to three significant digits.

Note: Your answer is assumed to be reduced to the highest power possible.