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.Management Sciences
Category: Atomic Spectra
The radiations emitted form hydrogen filled discharge tube show____________?
A. band spectrum
B. line spectrum
C. continuous spectrum
D. absorption spectrum
The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?
A. 6.2 x 10-10m
B. 9.1 x 10-18m
C. 3.11 x 10-10m
D. 4 x 10-10m
In He-Ne laser the lasing action is produced by_______________?
A. Ne only
B. He-Ne both
C. Electrons of He
D. Electrons Ne
Wave-like characteristic of electron is demonstrated by______________?
A. Line spectrum of atoms
B. Production of x-rays.
C. Diffraction by crystalline solids
D. Photoelectric effect
Radiation produced from TV picture tube is_____________?
A. B-rays
B. X-rays
C. Far infrared
D. Infrared
The minimum wavelength of X-rays can further be reduced by _______________?
A. Reducing the pressure or cooling the target
B. Increasing the temperature of the filament.
C. Using a target element of higher atomic number
D. Increasing the potential difference between the cathode and the target
Photon of highest frequency will be absorbed when transition takes place from_____________?
A. 1st to 5th orbit
B. 2nd to 5th orbit
C. 3rd to 5th orbit
D. 4th to 5th orbit
Reverse process of photoelectric effect is_______________?
A. pair production
B. Compton effect
C. annihilation of matter
D. X-rays production
When X-rays are passed through successive aluminum sheets what happens to their thickness ?
A. increases
B. it decreases
C. it remains same
D. sometimes increases and sometimes decreases
Reflecting mirrors in laser is used to______________?
A. Further stimulation
B. Lasing more
C. For producing more energetic lasers
D. All
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