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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
Frequency
B
Wavelength
C
Speed
D
Intensity
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 number of absorbed photons.
D
the mass of the escaped electron.
3) The deBroglie wavelength theory equation....
A
is used to calculate wavelength of matter, λ = h/p or λ = h/mv
B
is used to calculate the energy of a Photon E = hf
C
E=mc^2
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
combine with metal atoms to create electrons, which escape
B
are transformed into electrons with enough energy to escape.
C
transfer their energy to an electron, helping the electron escape.
D
are destroyed on impact, generating electrons which escape.
5) Which of the following behaviors of light provides evidence for its wave nature?
A
The amount of energy in a beam of light can be measured and calculated.
B
Light will travel indefinitely in a straight line until it strikes an object.
C
Two beams of light that meet can create interference with each other.
D
Light striking a flat surface at an angle is reflected at the same angle.
6) A ___________________________ is a discrete unit (quantum) of light energy.
A
photon
B
Planck
C
wavelength
D
work
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
1.98 x 10-18
B
7.3 x 10^-7
C
5.6 x 10^6
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
1.23 x 10^23
B
3.5244 x 10^-19
C
1.98 x 10^-18
D
3.56 x 10^-7
9) What is the Value of Planck's constant?
A
6.63 x 10^-34 Js
B
6.67 x 10^-19 Js
C
6.67 x 10^-11 Js
D
1.6 x 10^-19 Js
10) What is E = hf ?
A
Einsteins formula for the energy of a photon
B
De Broglie wavelength formula
C
Formula for frequency and the speed of light
D
Wavelength and frequency
11) Charge of an UP quark?
A
1/3
B
2/3
C
-2/3
D
-1/3
12) What distance is an angstrom?
A
10^-5 m
B
10^-10 m
C
10^-15m
D
10^-20 m
13) What distance is a femtometre?
A
10^-5 m
B
10^-10 m
C
10^-20 m
D
10^-15 m
14) What is the speed of light?
A
c = 3.00 x 10^9 nm/s
B
c = 3.00 x 10^8 m/s
C
c = 3.00 x 10^18 m/s
D
c = 3.00 x 10^8 nm/s
15) Whats the charge of a down Quark?
A
-1/3
B
2/3
C
-2/3
D
1/3
16) E =
A
mp
B
hc
C
fλ
D
hf
17) Physicist Thomas Young created the __________ to demonstrate the wave like properties of light.
A
Double-Slit Experiment
B
Shadow Box Experiment
C
Wave-Pool Experiment
D
Cat in the Box Experiment
18) What is the unit of measurement for Planck's constant
A
Joules
B
Coulombs
C
Joule seconds
D
Joules per second
19) What is the unit of measurement for Electromagnetic Charge?
A
Joule Seconds
B
Hz
C
Coulombs
D
Joules
20) What is an electron orbital?
A
There's no such thing
B
3-D shapes defining 90% probability region where electrons may be at any given energy state
C
The work function of a quark
D
The shape in which an electron perfectly orbits a nucleus
*select an answer for all questions
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