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WorksheetsQuantum physics (ch 24)
Total questions: 30
Worksheet time: 22mins
Which two correctly describe blackbodies. (mark 3 correct answers)
Perfect absorbers and emitters of radiation.
Thermal insulators located in space.
The emitted radiation is dependent on the temperature.
They emit different wavelengths of light depending on their absorption spectrum.
They are theoretical objects, true blackbodies do not exist.
Units of light emitted by a blackbody were originally called _____.
resonators
amperes
bolts
quanta
This spectrum shows the light absorbed by atoms is travels through? It appears as dark lines on a rainbow.
emission spectrum
absorption spectrum
dispersion spectrum
Helium spectrum
Which is the true statements regarding absorption spectra?
The wavelengths (and also the frequencies) of the spectrum are characteristic of the element emitting the light.
The wavelength of the spectrum are the same for all elements.
Absorption spectra form bright lines, representing small segments of the spectrum.
Due to specific frequencies of light being absorbed, the absorption spectrum looks like which of the following.
Bright lines on a dark background
Dark lines on a full spectrum
The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light
Intensity
Wavelength
Frequency
Energy
Which star(s) has the highest temperature?
WR102 which is a blue star.
Aldebaran (Alpha Tauri) and Mira (Omicron Ceti) which are red stars.
Alpha Centauri, a yellow star.
It is not possible to tell from the color of the star.
Light is shining on a metal, but no photoelectrons are released, which of the following should you do to get electrons?
Use a higher intensity light, but do not adjust the wavelength.
Use a lower intensity light, but do not adjust the wavelength.
Use light of a longer wavelength (lower frequency)
Use light of a shorter wavelength (higher frequency)
Light is shining on a metal, but you want to increase the number of electrons you are producing. Which of the following should you do?
Use a higher intensity light, but do not adjust the wavelength.
Use a lower intensity light, but do not adjust the wavelength.
Use light of a longer wavelength (lower frequency)
Use light of a shorter wavelength (higher frequency)
Light has a dual nature, therefore it behaves like ____.
A particle
A wave
Both a particle and a wave
A photon with a higher frequency also has a higher ______.
intensity
energy
amplitude
period
When high enough frequency of light strikes the surface of a metal, this occurs.
blackbody radiation
energy is created
refraction of light
the photoelectric effect
Which of the following best describes the energy states available to electrons?
Electron's energy states are quantized, meaning they can only be in certain specific amounts.
Electron's energy states are continuous, meaning they can be in any amount they would like.
Electron's energy states are undefinable, meaning we cannot determine their energy.
When photons have the same energy, which other things are the same? Mark 2 correct answers.
The photon's energy.
The photon's wavelength.
The photon's frequency.
The photon's momentum
Double slit interference can occur with which items? Mark 2 correct answers.
tennis balls
people
light
electrons
A beam of electrons has a dual nature, therefore it behaves like ____.
A particle
A wave
Both a particle and a wave
A blackbody emitting __________ light is hottest.
red
yellow
blue
A blackbody emitting __________ light is coolest.
red
yellow
blue
Energy levels available to electrons are ____.
whole number integers - 1, 2, 3, and so on.
half - integer values - 1.5, 2.5, 3.5, and so on.
continuous, they can be any integer value.
What is this image?
a pulsar equilibrium curve.
a polarization electric curve.
a blackbody radiation curve
a photoelectric effect graph.
Solar cells are examples of the application of which of the following?
blackbody radiation curves.
photoelectric effect.
gyroscopic precession
thermal equilibrium
High intensity light has ______________ photons, while low intensity light has _________ photons.
less / more
more / less
faster / slower
slower / faster
two of the above are correct.
A discreet bundle of electromagnetic energy that is carried in quantized amounts is a(n) _____________.
photon
amplifier
radiator
latent particle
The photoelectrons emitted from the photoelectric effect will have higher velocity if you increase the ____________ of the incoming light.
frequency
intensity
More electrons will be emitted from a metal with the photoelectric effect if the light has a higher __________.
frequency
intensity
How will you prepare for this exam?
Play or study the printed Quizizz
Practice with the Quizlet.
Re-read my worksheets and notes.
Ignore all study materials and sleep with a physics textbook under your pillow.
Watch the discovery channel.
