Question

GIVE REASON


NAPTHOLEON BALLS KEPT IN WARM CLOTHS DISA PPEARS OVER A PERIOD OF TIME.

A FLOUROCENT TUBE GLOWS WHEN ELECTRICITY PASSED THOUGHT IT.

IT IS EASIER TO REMOVE IN INKFROM A CLOTHCOLOUREDFEW DAYS AGO.

Answer 1

Naphthalene balls undergo sublimation due to which it converts directly into vapours and disappear into air without leaving any solid.






An electric current in the gas excites mercury vapor which produces short - wave ultraviolet light that then causes a phosphor coating on the inside of the bulb toglow. A fluorescent lamp convertselectrical energy into useful light much more efficiently than incandescent lamps.