A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Mobility
Drift velocity of charge carriers per unit
electric field
Mode
If the same value
appears a number of times in the data, this value is called mode.
Moderation
It is referred as method of slowing down of
neutrons in the range from fission energies to roughly below 1eV.
Moderator
Substance
used to reduce the energy of neutrons, called thermalization. Good moderator is
a substance having low absorption crossection, low atomic weight and high
scattering crossection.
(or)
Substance which can slow down neutrons with
minimum absorption. Generally moderators do shall have i) Large scattering
crossection ii) Small absorption coefficient iii) Low atomic number
Modulation
Process of sending electrical audio signal by superimposing
it on high frequency carrier wave for easy transmission to longer distances.
or
The transmission
of electrical energy radiatively is practicable only at high frequencies e.g.,
above 20KHz . In order to transmit audio signal properly, process of
superimposing electrical audio signal on high frequency carrier wave. The
resultant waves are known as modulation waves and process is called modulation.
Modulus
of Elasticity
The ratio of
stress to strain when deformation is totally elastic; it is measure of
stiffness of a material.
Modulus
of Resilience
The strain energy
per unit volume required stress a material from an unloaded state up to the
point of yield.
Modulus
of Rigidity
The ratio of
tangential stress to shearing strain within the elastic limit is called rigidity
modulus.
Molar
Gas Constant
The molar gas constant, also known as the universal molar gas
constant, is a physical constant that appears in an equation defining the
behavior of a gas under
theoretically ideal conditions. The gas constant is, by convention, symbolized R.
The gas constant has been found, by experiment, to have a value of
approximately 8.3145 Joules per
Kelvin per Mole (J · K-1 · mol-1).
Molar
Specific Heat
Amount of heat
required to raise the temperature by one degree centigrade or one Kelvin.
Molarity
Chemical quantity
used to describe concentration of solute in solution. It is defined as no. of
moles of solute per liter of solution.
Molding
Shaping a plastic
material by forcing it , under pressure and at an elevated temperature is called as a molding.
Mole
It is the
quantity of a substance, which corresponds to Avogadro’s number i.e. 6.023 x 1023
atoms.
Mole
Quantity of any
substance whose mass, in grams is numerically equal to its molecular weight is
called a mole.
Molecular
Range
The maximum
distance up to which a molecule exerts force of attraction is called as
molecular range.
Molecular
Spectrum
Spectrum which
arises from rotation of a molecule as a whole and vibrations of its constituent
atoms relative to one another as well as changes in its electronic
configuration.
Molecular
Weight
It is the sum of
atomic weights of all atoms in a molecule.
Molecule
A molecule is the
smallest particle in a chemical element or compound that has chemical
properties of that element or compound. Molecules are made up of atoms that are
held together by chemical bonds.
Moment
of Inertia
It is the inertia of rotation of a body
about the given axis.
Momentum
Physical quantity
which represents product of mass and velocity is called momentum.
Monochromatic
Aberration
Aberrations formed in images formed by
spherical mirrors and lenses when the source of light is monochromatic.
Monochromatic light
Technically light having single wave length is referred to as monochromatic wavelength. But no electromagnetic wave is purely monochromatic. Hence monochromatic light is said to have a wavelength within a short wavelength range.
