A. Less than ordinary light
B. More than ordinary light
C. Equal to ordinary light
D. Different for different colours or frequency
The velocity of laser light is___________________? Read More »
Atomic Spectra, Physics Mcqs A. Further stimulation
B. Lasing more
C. For producing more energetic lasers
D. All
Reflecting mirrors in laser is used to______________? Read More »
Atomic Spectra, Physics Mcqs A. Ne only
B. He-Ne both
C. Electrons of He
D. Electrons Ne
In He-Ne laser the lasing action is produced by_______________? Read More »
Atomic Spectra, Physics Mcqs A. 10-4 sec
B. 10-5 sec
C. 10-3 sec
D. 10-8 sec
The metastable state for an atom in laser light is_____________? Read More »
Atomic Spectra, Physics Mcqs A. Metal stable state
B. Normal state
C. Inverted population
D. All the above
A. Stimulated
B. Absorbed
C. Cause X-ray emission
D. Cause laser production
In normal state of energy the incident high energy photons will be______________? Read More »
Atomic Spectra, Physics Mcqs A. It does emit radiation
B. Its size as compare to proton and neutron is very small
C. No antiparticle of electron is present
D. The velocity of electron must be very high according to uncertainty principle
Electron cannot exist in the nucleus it is confirmed by observing that______________? Read More »
Atomic Spectra, Physics Mcqs A. Line spectrum of atoms
B. Production of x-rays.
C. Diffraction by crystalline solids
D. Photoelectric effect
Wave-like characteristic of electron is demonstrated by______________? Read More »
Atomic Spectra, Physics Mcqs A. Heating the filament
B. Electron excitation in the gas
C. Ionization of atoms
D. All the above
UV radiation can be produced by______________? Read More »
Atomic Spectra, Physics Mcqs A. The ions in a crystal are well arranged
B. The lines in a diffraction grating cannot reflect X-rays.
C. The penetration power of X-rays is high in a diffraction grating
D. The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal
