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
Micro
Canonical Ensemble
It is the
collection of a large number of essentially independent systems having the same
energy ‘E’, volume ‘V’ and number of particles ‘N’. The individual systems of a
micro canonical ensemble are separated by rigid, impermeable and well insulated
walls such that values of E, V, and N for a particular system are not affected
by presence of other systems.
Micro
Electro Mechanical Systems (MEMS)
They are miniature
“smart” systems consisting of multitude of mechanical devices that are
integrated with large numbers of electrical elements on a substrate of silicon.
Mechanical components act as micro sensors and micro actuators and are in form
of beams, gears, motors, and membranes. In response to micro sensor stimuli,
the electrical elements render decisions that direct responses to micro
actuator devices.
Microelectronics
Branch of electronics concerned with micro circuits
employing miniature sized components.
Microphone
Device used to
convert sound energy into changing electrical current.
Microscope
It is device
using converging lens of short focal length. When an object is seen through
this device, an erect, magnified and virtual image of object is seen.
Microscopic
Too small to be
visualized by naked eye.
Microscopy
The investigation
of micro structural elements using same type of microscope.
Microtron
Microtron is an
electron accelerator producing electrons in the energy range from 5 MeV to 50
MeV. It combines the features of a LinAc (resonant cavity for acceleration) and
a Cyclotron (constant magnetic field to keep accelerated particles in orbit)
and is sometimes referred to as electron cyclotron. The concept of the
microtron was proposed by Vladimir I. Vekslerin 1944 and the first prototype
unit was built in 1948 in Canada. The machine is used in modern radiotherapy,
albeit to a much smaller extent thanlinear accelerator. Electrons are
accelerated by a fixed frequency resonant cavity, make repeated passes through
the same cavity, and describe circular orbits in a constant magnetic field. Two
types of microtron are in use: circular and racetrack.
Microwave
Waves with
frequency between 300 MHz and 300GHz.
Mil
1/1000 of an
inch.
Mile
Unit of length;
1mile=1.60934 km.
Miller
Indices
A set of 3
integers (four for hexagonal structure) that designate crystallographic planes,
as determined from reciprocal of fractional axial intercepts.
Millikan’s
Oil Drop Method
An experiment conducted by Millikan to determine specific
charge of electron.
Milliman’s
Theorem
It states that if
several voltage sources are connected in series with admittances then
equivalent circuit is represented by voltage source in series with impedance.
Minkowski’s
Space Time
According to
Minkowski, the external world is not formed of ordinary 3 dimensional space
known as Euclidean space, but it is four dimensional space time continuum known
as Minkowski’s space; where the time may be regarded as fourth dimension. Thus an
event in Minkowski’s space can be represented by four coordinates, 3 being
space coordinates, fourth being time. Events in 4 dimensional space or Minkowski’s
space are represented by points known as world points and each particle
corresponds to a certain line known as word live.
Minute
A
unit of time equal to 1/60th of an hour.
(or)
A unit of angular measurement equal to 1/60th
of a degree.
Mirage
It is naturally forming
optical phenomenon that creates illusion of water, often with inverted
reflections of distant objects, and results from distortion of light by
alternate layers of hot and cool air. Cold air is denser than warm air and has
a greater refractive index. As light passes from colder air across a sharp
boundary to significantly warmer air, light rays bend away from direction of
temperature gradient. In alternate case light bends towards direction of
temperature gradient.
Mirror
Nuclei
Nuclei having
same mass number but with Proton & Neutron number interchanged.
Mirror
A surface usually glass polished with metal
amalgam capable of reflecting sufficient undiffused light to form an image of
an object placed in front of it.
MKS Unit
It is the system of units based on measuring lengths in meters, ‘mass’ in kilograms, and time in seconds. MKS system of units is generally used in engineering physics.
