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What is spontaneous emission? Explain in brief.
Spontaneous emission:
a. This is the process by that a light source as like an atom, molecule, nano-crystal or nucleus into an excited state undergoes a transition to the ground state and then emits a photon.
b. The atoms into the excited state drop to the lower energy state after they have stayed within the excited state for a short duration of time known their life time.
c. Throughout this process photons of energy hν = E2 - E1, that is energy difference in between the two states of the atom, those are emitted.
d. Spontaneous emission of light or luminescence is a basic process which plays a necessary role in various phenomena into nature and forms the basis of several applications, as like fluorescent tubes, plasma display panels, television screens, lasers and light emitting diodes.
Explain pure spectrum of white light
with the help of diagram explain the working of newton''s ring
I want a project on this topic for cbse board
Boat A is travelling at 4.6 m/s. Boat B is moving away from boat A at 9.2 m/s, as shown in the figure below. The captain of boat B blows an air horn with a frequency of 550 Hz
Question 1. Explain different types of CT artifacts. 2. Discuss the applications of Multidetector CT. 3. How will you be able to obtain cross sectional images in CT scan?
Write down the Maxwell's electromagnetic wave equations both in differential form.
CAPACITOR MEASUREMENTS : Many modern digital multimeters incorporate a capacitance measuring facility although this may be limited to just one or two ranges. The diagram below
one of scrooges relatives visited him in the counting house. who was it and what did he want ........................... i couldnt found a subject with reading
sensitivity of moving coil galvanometer can be increased by decreasing?
The units that may be derived from fundamental units are known as derived units.
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