Quiz Ch # 19
Physics quiz help you to prepare for exams
For pair production, the photon must have minimum energy ____.
A positron is a particle having ____.
In the photoelectric effect, which factor increases by increasing the intensity of incident photons?
In Compton scattering, the Compton shift ∆γ will be equal to Compton wavelength, if the scattering angle is ____ degrees.
The coordinate system in which the law of inertia is valid is called ____.
When a silicon crystal is doped with a pentavalent element, it becomes ____.
The maximum kinetic energy of photoelectrons depends upon ____ of incident light.
In 1905, the special theory of relativity was proposed by ____.
Which one of the following requires a material medium for their propagation _____.
A positron is an antiparticle of _____.
The momentum of the moving photon is ____.
Joule-second is the unit of ____.
A light-emitting diode (LED) emits light only when _____.
Joule second is the unit of ____.
Which light photon has the least momentum?
The rest mass energy of an electron-positron pair is _____.
Potassium cathode in photocell emits electrons for ____ light.
Light-emitting diodes (LED) are made from ____ semi-conductors.
Einstein was awarded Nobel Prize in Physics in ____.
The rest mass of the photon is:
All motions are:
At what speed would the mass of an electron become double of its rest mass?
Dimensional representation of Planck’s constant is the same as___________.
Emission of electrons by metals on heating is called _____.
In Compton scattering, the change in wavelength is maximum if:
The Absorption Power of a perfectly black body is always:
The Compton shift "∆λ" is equal to the Compton wavelength, if the scattered X-ray is observed at an angle '0' for ____________.
Which phenomenon proves -the particle nature of electromagnetic waves?
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