Question

Question 1 (1 point)

If light with a frequency below the cutoff frequency for a certain metal hits that metal:

Question 1 options:

	electrons will be ejected after the intensity of the light reaches a certain value
	no electrons will be ejected
	electrons will be ejected, but will fall back to the metal
	the light will be re-radiated by the metal
	I don't know.

Question 2 (1 point)

One electron-volt is equivalent to

Question 2 options:

	1 J
	1 V
	1.6 x 10^-19 J
	1.6 x 10^-19 V
	1 million N/C

Question 3 (1 point)

What is the energy associated with a photon of wavelength 620 nm?

Question 3 options:

	620 eV
	2 eV
	1.6 x 10^-19 J
	3.2 x 10^-19 J
	both b and d.

Question 4

What is the maximum kinetic energy of ejected electrons if a metal with a work function of 1.6 eV is struck by photons with wavelength of 620 nm?

Question 5 (1 point)

In the photon model of light, what will happen in you increase the intensity of light assuming the frequency of the light is above the cutoff frequency?

6. What is the de Broglie wavelength of a beam of electrons having kinetic energy K = 100 e.

7.

The electron volt is a unit of

Question 2 options:

	momentum.
	voltage.
	energy.
	charge.
	None of the above.

8.  If a beam of monoenergetic electrons with an energy of 78 eV are incident upon a crystal spacing (slit size) of 0.215 nm, what is the smallest angle for which we will see constructive interference?

9.

The potential energy associated with a Simple Harmonic Oscillator is given by

Question 4 options:

	a square wave.
	a step-function.
	a parabola.
	a hyperbola.
	I don't know

10. If the ground-state energy of a particle-in-a-box system is 11.8 eV, what is the energy of the n=2 level?

Answer 1