what is the principle used in electromagnetic spectrum?and
why there is a necessary of having an electron with unpaired
spins?and how the uncertainity principle is used to determine
the frequency of an spectral lines ?
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Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?
Name the metal that burns in oxygen with a dazzling white flame
What is curvilinear motion?
Explain the universal law of universal gravitation?
If a number of planes are talking off form an aircraft carrier, what is the minimum interval required between the take-off of the successive planes ?
Tell me what is ion pair energy?
Define weight?
-100 mmWC means how much kg/cm2
At what temperature does the filament of electric bulb glows ?
What is the difference between intrinsic and extrinsic semiconductors?
What is meant by reflection of waves?
What is the difference between emf & current