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
Latitude
A measure of
relative position north or south on the Earth's surface, measured in degrees
from the equator, which has latitude of 0°, with the poles having latitude of
90° north and south.
Lattice
Vector
Unit cell in a
crystal structure is defined by axial lengths called as lattice vectors.
Lattice
Constant
The magnitude of
lattice vector in a unit cell is called as lattice constant.
Lattice
Energy
Energy required
for separation of the ions of a crystal to an infinite distance from each
other.
Lattice
Parameters
The unit cell
geometry is completely defined in terms of six parameters; the three edge
lengths and three inter axial angles which were referred to as lattice
parameters.
Lattice
Three dimensional
array of points which coincide with atomic positions is called as Lattice.
Laue
Method
In this method, a
single crystal is held stationary in a beam of continuous wave length X-ray
radiation. Various crystal planes select the appropriate wave length for
constructive interference, and a geometric arrangement of bright spots is
obtained on a film.
Law
of Conservation of Angular Momentum
When no external
torque acts, then angular momentum of rotating system remains conserved.
Law
of Conservation of Energy
Energy can
neither be created nor destroyed, but it can be transformed from one form to
other.
Law
of Conservation of Linear Momentum
When no external
force acts upon a system, then the vector sum of momentum of all bodies of that
system remains constant.
Law
of Equipartition of Energy
The law has been
deduced by James Clarke Maxwell. As per this law “total kinetic energy of a
dynamical system is equally divided among all its degrees of freedom and it is
equal or ½ KT per degree of freedom.
Law
of Kinetic Friction
Kinetic friction is independent of area of
contact; kinetic friction is independent of relative speed between two contact
surfaces and is directly proportional to normal force.
Law
of Radioactive Disintegration
In any radioactive substance, the number of
atoms disintegrating per second is directly proportional to the number of atoms
present.
Law
of Static Friction
It states that
static friction is independent of area of contact, depends on nature of
surfaces in contact & maximum value is directly proportional to normal
force.
Laws
of Reflection
i)
Incident
point, reflected point and normal drawn to plane of reflection are coplanar.
ii)
Angle
of reflection is equal to angle of incidence.
Laws
of Refraction
i)
Incident
point, refracted point and normal drawn to plane of refraction are coplanar.
ii)
The
relationship between angle of incidence (ØI) and angle of refraction (ØR) is expressed by
Least
Count
It is the least
amount of a quantity that can be measured accurately with an instrument.
Leak
Rate
The
real leak rate is quantity of gas flowing per unit time into the system. The
leak rate of given system is expressed as pressure rise in a given time and for
specific volume.
(or)
The time required for a given quantity of gas
to flow into the system.
Least
Energy Principle
The principle
that the potential energy of a system in stable equilibrium is minimum relative
to that of nearby configurations.
Least
Squares Method
A
method for determining the best value of an unknown quantity relating one or
more sets of observations or measurements especially to find a curve that best fits
a set of data. It states that sum of squares of deviations of the
experimentally determined value from its optimum value should be minimum.
or
A
statistical technique to determine the line of best fit for a model. The least
squares method is specified by an equation with certain parameters to observed
data. This method is extensively used in regression analysis and estimation.
Leavo
Rotatory
These are substances which rotate the plane of polarization of incident plane polarized light in the anti-clock wise direction when seen in direction of light are called Leavo rotatory.
