State (a) the principle upon which the lightening in fluorescent tubes operate;
(b) two factors on which the colour of light from a fluorescent tube depends.
(b) two factors on which the colour of light from a fluorescent tube depends.
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Correct Answer: Option n
Explanation:
(a) Lightening in fluorescent tubes operate on the principle of electric discharge through low pressure gas.
(b) Colour of light from fluorescent tube depend on (i) Nature of the coating inside the tube (ii) Nature of the gas in the tube.
(a) Lightening in fluorescent tubes operate on the principle of electric discharge through low pressure gas.
(b) Colour of light from fluorescent tube depend on (i) Nature of the coating inside the tube (ii) Nature of the gas in the tube.