Question

1.

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.

2.  

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

3)

Considering two-slit interference, the locations where bright spots are found on the screen are due to

Question 1 options:

	Destructive interference.
	Constructive interference.
	Dispersion.
	Diffraction.
	None of the above.

4) If light with a wavelength of 550 nm is incident on a pair of slits separated by 0.05 mm, what is the angle to the first off-center bright spot?

5)

Huygens' principle states that

Question 3 options:

	Monocromatic light incident upon two slits will form an interference pattern.
	Monocromatic light incident upon a single small slit will form an interference pattern.
	Each point on a wave crest can be modeled as a point source for wavelets.
	The optical resolution of the eye is limited.
	None of the above.

6)

In a two-slit interference pattern, the pattern becomes fainter as we move away from the central maximum due to

Question 4 options:

	Interference
	Diffraction
	Resolution
	The Rayleigh criterion
	I don't know.

7)

7) Unpolarized light is incident upon a polarizer whose axis is tilted 30 degrees relative to vertical. What fraction of the light is transmitted through the polarizer?

8) What is the de Broglie wavelength of a beam of electrons having kinetic energy K = 100 eV

9)

The electron volt is a unit of

Question 2 options:

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

10) 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?

11)

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.

12) 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