Question 13.5 pts
If one increases the intensity of violet light shining on a photoelectric surface then an increase is also observed in the ________.
Group of answer choices
threshold frequency
number of electrons ejected per second
kinetic energy of the ejected electrons
time lag between the absorption of blue light and ejection of electrons
none of the above
Question 23.5 pts
Which radio wave that is diffracted more around buildings and hills?
Group of answer choices
AM
FM
both diffract equally
Question 33.5 pts
Superposition of waves can produce ______.
Group of answer choices
partial cancellation
cancellation
reinforcement
all the above
Question 43.5 pts
An ideal Polaroid will transmit 50% of incident sunlight. How much light will be transmitted by two ideal Polaroids oriented with their axes perpendicular to each other?
Group of answer choices
between 0% and 50%
100%
50%
between 50% and 100%
0%
Question 53.5 pts
The energy per photon of the UV light is greater than in _______.
Group of answer choices
microwaves
radio waves
visible light
all of the above
none of the above
Question 63.5 pts
Astronomers can detect the spin rates of stars by ______.
Group of answer choices
their temperature
changes in temperature
the Doppler effect
absorption spectra
all of the above
Question 73.5 pts
A dolphin perceives information about its surrounding by emitting sonic waves of _____.
Group of answer choices
greater speed
greater intensity
higher frequency
lower frequency
none of the above
Question 83.5 pts
If a proton and an electron have the same wavelength, the larger momentum belongs to the ______.
Group of answer choices
proton
electron
both the same
Question 93.5 pts
In Heisenberg's formula, △p △x≥ h, the △p symbolizes _______.
Group of answer choices
change in momentum
increase in position
certainty of momentum
uncertainty in position
uncertainty in momentum
Question 103.5 pts
Light will pass through a pair of Polaroids when their axes are _____.
Group of answer choices
parallel
45 degrees to each other
either of these
neither of these
Question 113.5 pts
Applying E = hf to photon emission from an atom, the symbol E represents the energy _______.
Group of answer choices
difference between atomic energy levels producing the photon
of the emitted photon
both of these
neither of these
Question 123.5 pts
Light behaves as a wave when it _____.
Group of answer choices
travels from one place to another
interacts with matter
both of these
neither of these
Question 133.5 pts
A rocket and an electron have the same momentum. Which has the longer wavelength?
Group of answer choices
the bullet
the proton
both the same
Question 143.5 pts
A plane wave incident on a barrier and pass through a small slit. On the other side of the barrier, the plane wave ______.
Group of answer choices
converges
fans out
becomes polarized
continues as a plane wave
all of the above
Question 153.5 pts
In quantum theory, which of the following quantities is quantized?
Group of answer choices
energy
number of atoms in a gold bar
electric charge
radiation
all of the above
Question 163.5 pts
In Heisenberg's formula, △p △x≥ h, the h represents ______.
Group of answer choices
the peak value of Planck's constant
an average value of Planck's constant
Planck's constant
Planck's constant divided by 2Ï€
none of the above
Question 173.5 pts
The idea of complementarity is evident in the _____.
Group of answer choices
dual nature of light
yin-yang symbol of Eastern cultures
notion of opposites being components of a whole
all of the above
none of the above
Question 183.5 pts
The underlying theory behind photovoltaic solar cells is ______.
Group of answer choices
photon capture
electron diffraction
the photoelectric effect
none of the above
Question 193.5 pts
The Heisenberg uncertainty principle says _______.
Group of answer choices
we can't simultaneously measure exactly both the position and momentum of a particle
Planck's constant sets a limit on accuracy of measurements
we can't simultaneously measure exactly a particle's energy and time having that energy
all of the above
Question 203.5 pts
The photoelectric effect is an example of _____.
Group of answer choices
particle nature of light
wave nature of light
both of these
none of these
Please show your full solution steps. First state what is given, then start with the symbolic equation, then show data entered into the equation, and then the final answer with proper units. Please write your steps vertically. You will not gain credit for showing only the answer.
Question 2110 pts
What would a photographic image look like if you place a diffraction grating in front of a camera lens?
Question 2210 pts
If an atom absorbs UV light and emits a red light, what happens to the missing energy?
Question 2310 pts
Is it true that the uncertainty principle tell us that we can never know anything for certain? Explain.
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