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1) A beam of light is directed onto a sheet of metal, but electrons are not ejected from the metal. Increasing which of the following could possibly cause the metal to begin to eject electrons?
A
Intensity
B
Frequency
C
Speed
D
Wavelength
2) As a photon strikes a piece of metal, the kinetic energy of an ejected electron is determined by -
A
the frequency of the absorbed photon.
B
the path taken by the escaped electron.
C
the mass of the escaped electron.
D
the number of absorbed photons.
3) The deBroglie wavelength theory equation....
A
is used to calculate wavelength of matter, λ = h/p or λ = h/mv
B
E=mc^2
C
is used to calculate the energy of a Photon E = hf
D
Not even real
4) In some situations, when a beam of light is directed at a metal surface, an electron is emitted. This happens because the photons in the light -
A
are destroyed on impact, generating electrons which escape.
B
transfer their energy to an electron, helping the electron escape.
C
combine with metal atoms to create electrons, which escape
D
are transformed into electrons with enough energy to escape.
5) Which of the following behaviors of light provides evidence for its wave nature?
A
Light striking a flat surface at an angle is reflected at the same angle.
B
The amount of energy in a beam of light can be measured and calculated.
C
Two beams of light that meet can create interference with each other.
D
Light will travel indefinitely in a straight line until it strikes an object.
6) A ___________________________ is a discrete unit (quantum) of light energy.
A
work
B
Planck
C
wavelength
D
photon
7) If radiation has a frequency of 3.0 X 10^15 Hz and it strikes a material, what is the energy of each incident photon (Planck’s constant is 6.6 X 10^-34)?
A
7.3 x 10^-7
B
5.6 x 10^6
C
1.98 x 10-18
D
1.23 x 10^23
8) If the frequency of light is 5.34 X 10^14 Hz, calculate the energy of the photon (Planck’s constant is 6.6 X 10^-34).
A
1.98 x 10^-18
B
3.5244 x 10^-19
C
1.23 x 10^23
D
3.56 x 10^-7
9) What is the Value of Planck's constant?
A
1.6 x 10^-19 Js
B
6.63 x 10^-34 Js
C
6.67 x 10^-19 Js
D
6.67 x 10^-11 Js
10) What is E = hf ?
A
Einsteins formula for the energy of a photon
B
De Broglie wavelength formula
C
Wavelength and frequency
D
Formula for frequency and the speed of light
11) Charge of an UP quark?
A
-1/3
B
2/3
C
1/3
D
-2/3
12) What distance is an angstrom?
A
10^-10 m
B
10^-5 m
C
10^-20 m
D
10^-15m
13) What distance is a femtometre?
A
10^-10 m
B
10^-15 m
C
10^-5 m
D
10^-20 m
14) What is the speed of light?
A
c = 3.00 x 10^18 m/s
B
c = 3.00 x 10^9 nm/s
C
c = 3.00 x 10^8 m/s
D
c = 3.00 x 10^8 nm/s
15) Whats the charge of a down Quark?
A
1/3
B
-1/3
C
2/3
D
-2/3
16) E =
A
fλ
B
hc
C
hf
D
mp
17) Physicist Thomas Young created the __________ to demonstrate the wave like properties of light.
A
Shadow Box Experiment
B
Cat in the Box Experiment
C
Wave-Pool Experiment
D
Double-Slit Experiment
18) What is the unit of measurement for Planck's constant
A
Joules
B
Joules per second
C
Joule seconds
D
Coulombs
19) What is the unit of measurement for Electromagnetic Charge?
A
Coulombs
B
Hz
C
Joule Seconds
D
Joules
20) What is an electron orbital?
A
3-D shapes defining 90% probability region where electrons may be at any given energy state
B
The work function of a quark
C
The shape in which an electron perfectly orbits a nucleus
D
There's no such thing
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