A. he/ev
B. he/Vc
C. eV/h
D. impossible to predict
Correct Answer: he/ev ✔
Last Updated: January 20, 2021
Related MCQs
- The velocity of laser light is__________?
- Reflecting mirrors in laser is used to__________?
- In He-Ne laser the lasing action is produced by__________?
- The metastable state for an atom in laser light is__________?
- In laser production the state in which more atoms are in the upper state than in the lower one is called__________?
- In normal state of energy the incident high energy photons will be__________?
- Electron cannot exist in the nucleus it is confirmed by observing that__________?
- Wave-like characteristic of electron is demonstrated by__________?
- UV radiation can be produced by__________?
- X-rays are diffracted by a crystal but not by a diffraction grating because__________?
- Maximum frequency in the spectrum from X-ray tube is directly proportional to the__________?
- 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__________?
- The characteristic X-rays spectrum is due to__________?
- The minimum wavelength of X-rays can further be reduced by __________?
- Radiation produced from TV picture tube is__________?
- Quality of X-rays depends upon __________ A-filament current B-accelerating voltage C-material of the target ?
- When X-rays are passed through successive aluminum sheets what happens to their thickness ?
- X-rays are similar in nature to__________?
- In an electronic transition atom cannot emit__________?
- Radiation with wavelength longer than red lights__________?
- Reverse process of photoelectric effect is__________?
- The penetrating power of X-rays depends on their__________?
- Bracket series is obtained when all transition of electron terminate on__________?
- The electric P.E of an electron in an orbit at a distance rn from the positive charge__________?
- Ground state energy of the 4th orbit in a H-atom is__________?
- Which one of following postulate is in accordance with the Rutherfords model ?
- When we excite some atoms by heat collision or electrical discharge they will__________?
- In obtaining an X-ray photograph of our hand we use the principle of__________?
- Photon of highest frequency will be absorbed when transition takes place from__________?
- The radiations emitted form hydrogen filled discharge tube show__________?
- Total number of series in hydrogen spectrum is__________?
- X-ray are__________?
- Hydrogen atom does not emit X-rays because __________?
- Excited atoms return to their ground state in__________?
- In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
- Ratio of the weight of H-atom to that of an electron is approximately__________?