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Lambert's laws (J.H. Lambert):
Lambert's first law
The illuminance on a surface illuminated through light falling onto it perpendicularly from a point source is proportional to the inverse square of the distance among the surface and the source.
Lambert's second law
If the rays meet the surface at a particular angle, then the illuminance is proportional to the cosine of the angle along the normal.
Lambert's third law
The luminous intensity of light reduced exponentially through distance as it travels via an absorbing medium.
The current in an RL circuit builds up one-third of its steady value in 4.56s. Find the inductive time constant.
A transformer is a static device which transfers AC electrical power from one circuit to another at the same frequency but the voltage level is changed usually. When the voltage is
Some experiments with soap films Make the following forms from wire. Dip the several forms in the thick soap solution and view the films. Dip the wire form with the slider i
Which graph represents the angular velocity as function of time in which the magnitude of angular velocity is contiguously decreasing? Ans) That is down parabola from origin gra
Illustrate the graphs showing variation of inductive reactance and Capacitive reactance with frequency of applied a.c. source.
The sense of vision consist of three major components : The eyes that focus an image from the outside world on the light sensitive retina The system of millions of nerve
The current induced in the conductor due change in magnetic field is called eddy current.we study more about this in electro magnetic laws.
Q Define: self inductance. The coefficient of self induction of a coil is numerically equivalent to the opposing emf induced in the coil when the rate of change of current thr
Construction and working of michelson''s interferometer in detail
The angular displacement of a body is a function of time and giving by equation h=10+3t+6t square,where t is in seconds.determine the angular velocity, acceleration when t=5seconds
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