Radiation with wavelength longer than red lights______________?
Radiation with wavelength longer than red lights______________? A. ultraviolet rays B. X-raysC. infra red radiation D. visible radiation
Radiation with wavelength longer than red lights______________? A. ultraviolet rays B. X-raysC. infra red radiation D. visible radiation
Reverse process of photoelectric effect is_______________? A. pair production B. Compton effect C. annihilation of matterD. X-rays production
The penetrating power of X-rays depends on their______________? A. applied voltageB. frequency C. source D. all of the above
Bracket series is obtained when all transition of electron terminate on_______________? A. 4th orbit B. 5th orbit C. 3rd orbit D. 2nd orbit
The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________? A. Ke2/rn B. Ke2/rn2C. ÀKe2/rn D. ÀKe2/rn2
Ground state energy of the 4th orbit in a H-atom is_____________? A. 13.60 eV B. 3.40 eVC. 0.85 eV D. 1.51 eV
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
When we excite some atoms by heat collision or electrical discharge they will________________? A. radiate electromagnetic energy with a continuous distribution of wavelength B. absorb particular wavelengths when white light is incident on themC. radiate electromagnetic energy of discrete characteristic…
In obtaining an X-ray photograph of our hand we use the principle of______________? A. photo electric effect B. ionizationC. shadow photograph D. any of above
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