Atomic hydrogen has a life period of
A). One hour
B). One day
C). One minute
D). A fraction of a second
A fraction of a second
Atomic hydrogen is unstable and it has life period of a fraction of a second.
1. The wall of a dam is broader at the base
2. Holography is a technique of
4. Optical Fibre technology works on which of these principles of Physics?
5. Outside of cooking utensils are generally left black from below because
6. Moving electric charge produces :
7. The process of emission of electrons?from metal by UV rays is-
8. Which of the following has the longest wavelength?
10. When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to :