The radiations emitted form hydrogen filled discharge tube show____________?
The radiations emitted form hydrogen filled discharge tube show____________? A. band spectrumB. line spectrum C. continuous spectrum D. absorption spectrum
The radiations emitted form hydrogen filled discharge tube show____________? A. band spectrumB. line spectrum C. continuous spectrum D. absorption spectrum
Total number of series in hydrogen spectrum is_____________? A. three B. fourC. five D. six
X-ray are________________? A. of unknown nature B. high energy electronsC. high energy photons D. radio isotopes
Hydrogen atom does not emit X-rays because _________________? A. its energy levels are too close to each other B. its energy levels are too far apart C. it is too small in sizeD. it has a single electron
Excited atoms return to their ground state in_______________? A. 10-10sB. 10-8s C. 10-6s D. 10-9s
In hydrogen spectrum which one of the following series lies in the ultraviolet region ? A. Balmer series B. Pfund series C. Bracket seriesD. Lymann series
Ratio of the weight of H-atom to that of an electron is approximately______________? A. 18.336B. 1836 C. 18360 D. 183.6