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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.
quenching process in g.m. counter
Materials, which provide a path to the magnetic flux, are classified as (A) Insulating materials. (C) Magnetic materials. (B) Semi conducting materials. (D) Die
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Distinguish between a terrestrial telescope and an astronomical telescope. Explain Rams dens' eye piece with the help of a neat diagram. Illustrate its advantages and disadvantages
The radius of an atom is of the order of: (1) 10 -10 cm (2) 10 -13 cm (3) 10 -15 cm (4) 10 -8 cm Ans: (4)10 -8 cm
With Schematic diagram explain the working of a Michelson interferometer. Obtain the expression for radii of circular interference fringes. How shall you use it to measure waveleng
The wedge Make a wedge from a piece of wood and drive it inside a table leg or some other heavy object. View that the wedge is a double inclined plane
definition, Working principal, applications ??
An electron in the hydrogen atom loses 3.02 eV as it falls to energy level E 2 . From which energy level did the atom fall?
Which of the subsequent conditions must be met in order for a uniform magnetic field to exert a force on a particle? Ans: A charged particle has to be in a magnetic ground
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