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Why population inversion is essential to achieve in lasing action? a) Define zener breakdown. b) What is called nanomaterials?
A device which changes light energy into electrical energy is known as photoelectric cell. It is also known as photocell or electric eye.
Human Eye: It is spherical in shape, diameter about 2.5 cm, having of three layers. a) Sclera b) Choroid
Using Gauss divergence theorem show that the volume of a sphere of radius 'r' is 4⁄3 πr 3 .
sodium metal with a body centred cubic structure has two atoms per unit cell. the radius of sodium atom is 1.85 å. calculate its electrical resistivity at 0 oc, if the classical va
Forward Bias: When p-type material of a semiconductor diode is linked at positive potential and the n-type material is linked at negative potential of a voltage source, the dio
Why different colours of white light travell with different speed in a glass prism,while they travell with same speed in air? Ans)Since in diffeernt medium frequecy remains const
ACCELERATION: The time rate of change of velocity of a body is known as acceleration.
What is the size of an atom?What is the size of an atom?What is the size of an atom?What is the size of an atom?What is the size of an atom?What is the size of an atom?
Q. Distinguish between interference and diffraction fringes? Interference Diffraction 1) It is because of the superposition of secon
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