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Kirchhoff's law of radiation (G.R. Kirchhoff):
The emissivity of a body is equivalent to its absorptance at the simialr temperature.
Kirchhoff's laws (G.R. Kirchhoff)
Kirchhoff's first law
An incandescent solid or gas under high pressure will generate a continuous spectrum.
Kirchhoff's second law
A low-density gas will radiate an emission-line spectrum along with an underlying emission continuum.
Kirchhoff's third law
Continuous radiation viewed by a low-density gas will generates an absorption-line spectrum.
450J of energy are changed into heat in 1 minute. What power is dissipated? A current of 10A ?ows by a conductor and 10Wis dissipated. What p.d. exists across the ends of
Write two characteristic features of nuclear force which differentiate it from the Coulomb force.
Q. Select the correct trajectory of the ball after it breaks? A ball is being whirled on a string. At the instant shown in figure, the string breaks. choose the correct traject
Write the mathematical expression for the refractive index in terms of A and D for a prism, explain the symbols. Mention any two factors on which lateral shift depends.
How does electricity affect the phosphorus cycle?
A student finds that a particle whose life is micro-sec (µ- sec) moves with a velocity of 2.7 x 108 m/sec. i) What will be its lifetime as measured by another observer in the labor
why effective mass are tensor quantities
Calculate the current needed in a 240 mm length of conductor of a d.c. motor when the conductor is situated at right-angles to the magnetic field of flux density 1.25T, if a force
How is sensitive flame method used for detection of ultrasonic waves? Sensitive flame method: A narrow sensitive flame is shifted along the medium. At the situations of anti
sonic waves
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