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when a body is heated it expands in terms of area length amp temperature and volume rises in a solid molecules may only have thermal agitation as
unpolarized light in ordinary light light from sun bulb etc the electric field vectors are given in all directions in a light is known as unpolarized
light propagates as transverse em rays the magnitude of electric field is much larger as compared to magnitude of magnetic field we generally prefer
in this case both source and screen are effectively at infinite distance from the diffracting devicebasic types diffraction at single slit double
if either screen or source or both are at preset distance from the diffracting device obstacle or aperture the diffraction is known as fresnel
the phenomenon of diffraction was first discovered by girmaldi its experimental study was completed by newtons and young the theoretical explanation
the process of apparent change in frequency or wavelength of the light because of relative motion among the source of light and the observer is known
if we permit monochromatic light to fall normally on the surface of lens then circular interference fringes of radius r can be consider in the
when two waves of exactly similar frequency coming from two coherent sources travels in a medium in the similar direction simultaneously then because
major steps for analyzing forces in uniform circular motion let consider one axis along the radius of circle ie in direction of acceleration and
force on the particle for a mass m to have acceleration a force given by f ma is always required in uniform circular motion acceleration is of value
a block goes on a wedge which in turns goes on a horizontal table as given in figure the wedge angle is phias long as the wedge is in met with table
the frames of reference which are themselves accelerating rotating etc like that newtons first law of motion becomes invalid in their case can be
the set of rectangular axes obeying the newtons laws of motion and used to describe the position of a particle or an event are known as inertial
friction has several disadvantages but life is impossible without friction because friction has many benefits
the opposition offered to the circular motion of bodies like sphere disc ring cylinder etc on another surface is known as rolling
a block is considered on a rough horizontal surface if we give a variable force f on the block and if we enhance the force f continuously then we
each object continues to be in its state of uniform motion or of rest in a straight line unless completed by some external force to perform
stable equilibriumif object is in stable equilibrium and if we displace object to a very little displacement dr then it will return back to starting
conservative force a force is told conservative when the work completed by the force in moving a particle from an instance to another instance is
mechanical energy e of particle system or object is explained as the sum of kinetic energy k and potential energy u ie e k u it is a scalar
two point changes q1 and q2 are placed at a distance r from one another then electrostatic potential energy of two phase charge system will be
the energy possessed by a object by virtue of its position or its configuration is called its potential energyconcept of potential energy is valid
the energy possessed by a object by virtue of its motion is known as kinetic energy kethe ke of a moving body is similar to the amount of work that
energy is defined as internal capacity of doing work when we call that a body has energy we denote that it can do workenergy seems in many forms such