X-ray are________________?

Related Mcqs:

In hydrogen spectrum which one of the following series lies in the ultraviolet region ?

A. Balmer series B. Pfund series C. Bracket series D. Lymann series...

Excited atoms return to their ground state in_______________?

A. 10-10s B. 10-8s C. 10-6s D. 10-9s...

Radiation with wavelength longer than red lights______________?

A. ultraviolet rays B. X-rays C. infra red radiation D. visible radiation...

In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?

A. Metal stable state B. Normal state C. Inverted population D. All the above...

The metastable state for an atom in laser light is_____________?

A. 10-4 sec B. 10-5 sec C. 10-3 sec D. 10-8 sec...