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- Multiple ChoicePlease save your changes before editing any questions.
The SI unit of frequency is the __________.
meter
second
hertz
meter per second
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle is negatively charged?
proton
neutron
electron
quark
- Multiple ChoicePlease save your changes before editing any questions.
True or False? The wavelength and frequency of all waves are inversely proportional to each other.
True
False
- Multiple ChoicePlease save your changes before editing any questions.
What's the name of the infamous experiment in Quantum Physics?
Double-Split Experiment
One-Slit Experiment
Double-Decker Experiment
Double-Slit Experiment
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
A monochromatic light beam with a quantum energy of 9.0 eV is incident upon a photocell. The work function of the photocell is 4.1 eV. What is the maximum kinetic energy of the electron.
4.2 eV
4.4 eV
4.7 eV
4.9 eV
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.The photoelectric effect only occurs if the light shining on the metal is:coherent.above a minimum intensity.above a minimum frequency.above a minimum wavelength.
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
the minimum frequency for which the photoelectric effect can occur is called the
absolute frequency
cut off frequency
Lyman frequency
threshold frequency