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a laser beam of wavelength 630 nm coherence width 8x10 -3 m and power 10mw shines on a surface 100 m away. deduce the illumination. compare it with that due to a collimated beam from a torch filament of diameter 0.1 cm , lence of focal length 10 cm and power 10 w
Obtain an expression for paramagnetic susceptibility of free electrons on the basis of the
classical laws. Discuss its inadequacy and show pouli modified it.?
a sample of germanium shows no Hall effect. If the mobility of electrons in germinium is 3500 cm2/V.sec and that of holes is 1400 cm2/V.sec. What fraction of the current in the sample is carried by electrons ?
A sample of Germanium shows no Hall effect. If the mobility of electrons in Germanium is 3500
cm2/V.sec and that of holes is1400 cm2/V.sec .What fraction of the current in the sample is
carried by electrons
Obtain an expression for paramagnetic susceptibility of free electrons on the basis of classical laws . Discuss its inadequacy and show pouli modified it.
A laser beam of wavelength 6 x 10 in, coherence width 8 x 10 'in and power 10mW shines on a SMarks surface l00m away. Deduce the illumination. Compare it with that due to a collimated beam from a torch filament of diameter 0.1 cm, lens of focal length l0cm and power 10W.
A sample of Germanium shows no Hall effect. If the mobility of electrons in Germanium is 3500 cm2/V.sec and that of holes is 1400 cm2/V.sec, what fraction is carried by electrons?

of the current in the sample is
A laser beam of wavelength 630 nm coherence width 8x10 -3 M and power 10Mw shines on a surface 100 M away. Seduce the illumination. Compare it with that due to a collamated beam from a torch filament of diameter 0.1 cm , lence of focal length 10 cm and power 10 W.
A laser beam of wavelength 6x10-7m, coherence width 8x10-3 m and power 10mW shines on a
surface 100m away. Deduce the illumination. Compare it with that due to a collimated beam from
a torch filament of diameter 0.1 cm, lens of focal length 10cm and power 10W.
A sample of germanium shows no Hall effect. If the mobility of electrons in germanium is 3500 cm cube/v. see and that of holes is 1400cm cube/v. see. What fraction of the current in the sample is carried by the electrons?
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