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.Management Sciences
Category: Atomic Spectra
Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?
A. A & B
B. B & C
C. A & C
D. A B & C
UV radiation can be produced by______________?
A. Heating the filament
B. Electron excitation in the gas
C. Ionization of atoms
D. All the above
X-ray are________________?
A. of unknown nature
B. high energy electrons
C. high energy photons
D. radio isotopes
In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?
A. he/ev
B. he/Vc
C. eV/h
D. impossible to predict
Which one of following postulate is in accordance with the Rutherfords model ?
A. continuous spectra for atoms
B. discrete spectra for atoms
C. either continuous nor discrete
D. no spectrum
Radiation with wavelength longer than red lights______________?
A. ultraviolet rays
B. X-rays
C. infra red radiation
D. visible radiation
In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?
A. Metal stable state
B. Normal state
C. Inverted population
D. All the above
The velocity of laser light is___________________?
A. Less than ordinary light
B. More than ordinary light
C. Equal to ordinary light
D. Different for different colours or frequency
X-rays are similar in nature to_______________?
A. Cathode rays
B. Positive rays
C. γ-rays
D. Beta rays
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