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WorksheetsQuantum Physics
Total questions: 31
Worksheet time: 16mins
Which subatomic particle is negatively charged?
proton
neutron
electron
quark
What's the name of the infamous experiment in Quantum Physics?
Double-Split Experiment
One-Slit Experiment
Double-Decker Experiment
Double-Slit Experiment
When the top of one wave meets the bottom of another wave, they...
call each other out.
cancel each other out.
cancel each other off.
don't cancel each other out.
An Interference Pattern appears when...
two particles interact with each other.
waves interact with particles.
two waves interact with each other.
particles interact with particles.
What does the observer do?
The observer collapses the wave function into particle.
The observer collapses the particle into a wave function.
The observer collapses the whole system simply by observing.
The observer collapses the wave function into a wave.
Photoelectrons will be ejected from a material surface if?
The threshold frequency is greater than the photon frequency
The work function is less than the photon energy
The intensity of light is high enough
The wavelength of photon is maximum
In an experiment, photoelectric effect is observed in metal A when light with frequency (f ) falls on the metal. If the light frequency used in this experiment is doubled, the photoelectrons
Will not be ejected
Will be ejected as observed in the previous
Will be ejected with greater number of photoelectrons
Will be ejected with greater kinetic energy
A metal surface is struck with light of λ = 400 nm, releasing a stream of electrons. If the 400 nm light is replaced by λ= 300 nm light of the same intensity, what is the result?
More electrons are emitted in a given time interval
Fewer electrons are emitted in a given time interval
Emitted electrons are more energetic
Emitted electrons are less energetic
The SI unit of frequency is the __________.
meter
second
hertz
meter per second
True or False? The wavelength and frequency of all waves are inversely proportional to each other.
True
False
Which of the following colors of visible light has the highest frequency?
Blue
Green
Orange
Red
Violet
Which color of light moves at the fastest speed?
blue
green
yellow
red
All light travels at the same speed.
Wave -particle duality is supported by...
electrons behaving as particles with ordinary matter
electrons behaving as waves when travelling through space
the photo electric effect
all of the above
Planck's constant can be found ...
energy of a particle x speed of light / wavelength
energy of a particle x speed of light / frequency of light
energy of a particle x wavelength / speed of light
slope of the cut-off voltage vs frequency graph
De Broglie equation
relates the momentum of a mass to its wavelength
relates the energy of a mass to its wavelength
relates the frequency of a mass to its wavelength
relates the work function of a mass to its wavelength
If waves can behave like particles, then particles can behave like a wave. This is the idea behind...
Quantization of Energy
Photoelectric Effect
Compton Effect
deBroglie Waves
Uncertainty Principle
As per Plank's hypothesis an oscillator can have only discrete energy values given by (see the image), where n= __________
1,2,3 .................
0,1,2,3........
All the above
Einstein's photoelectric equation is
The amount of energy required to cause an electron to emit is called the
Threshold Frequency
The Kinetic Energy Max
The Intensity
The Work Function
The equation which links Energy to wavelength is...
E=hf
E=λhf
E=λhc
c=fλ
The particle-like behaviour of light became well known around the world. It earned Einstein his first nobel prize. Who turned this idea upside down and suggest that particles might have wave behaviour?
Dmitri Mendeleev
Albert Einstein again
Linus Pauli
Louie de Broglie
A ground state electron is
freshly crushed into a fine powder.
in the highest possible energy level.
in the lowest possible energy level.
constantly emitting light.
In the speed of light equation, c stands for
frequency
wavelength
the speed of light
Carbon
Quantum mechanics describes the motion of ______ as waves.
very large objects such as stars and planets
everyday size objects such as cars and trucks
very tiny objects such as atoms
Who is responsible for the quantization of energy?
Planck
Einstein
Compton
de Broglie
Heisenberg
Who is responsible for the uncertainty principle?
Planck
Einstein
Compton
de Broglie
Heisenberg
The amount of energy an object is allowed to have is...
continuous at the macro level and quantized at the micro level
continuous at both the macro and micro levels
quantized at both the macro and micro levels
quantized at the macro level and continuous at the micro level
Light has properties of a wave and of a particle. What is a property of light that shows it behaves like a particle? (The others listed show how it behaves like a wave.)
interference
frequency
period
quantized energy
What did Einstein win his Nobel Prize for?
E = mc2
Special Relativity
General Relativity
Photoelectric Effect
Why do we see colors when we look at neon signs?
Electrons are jumping from an excited state to a normal state and giving off energy
Electrons are jumping from a normal state to an excited state and absorbing energy
Electrons are jumping from an excited state to a normal state and absorbing energy
Electrons are jumping from a normal state to an excited state and giving off energy
