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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.
MOVEMENT OF CHARGE: Although electric current is referred to as the flow of electrons through a conductor, it should be noted that more exactly, any movement of electric charge
It is the property of changing readily from a solid or liquid to a vapour. It is the speed that a chemical compounds evaporates. Higher volatility indicates faster evaporation.
A bar of length l is clamped at x=0 and loaded with a mass mat x=l.(a) apply these boundary conditions to equation x=A e^(wt+kx)+Be^(wt- kx) and thereby determine an equation from
Q. Distinguish between electric power and electric energy. Electric power i) Electric power is described as the rate of doing electric work. ii) Electric power is the cre
on air pollution
standard dimensions of a tanker truck for storage of crude oil ... metion its length , siameter, thickness of insulation
what arethe concepts oflight
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2-Point Source Interference Patterns The diagram below displays various two-point source interference patterns. The crests of each wave are denoted through a thick line althoug
Depending upon the penetration power, there are two parts of X-rays Hard X-rays More penetration power More frequency of the order of ≈ 1019 Hz Lesser wavelength range
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