a) On what principle does lighting in a fluorescent tube operate?
(b) State two factors which determine the colour of light produced in a fluorescent tube.
Explanation
(a) The princle on which lighting in a fluorescent operation is electrical discharge through a gas at low pressure and at high voltage.
(b) The colour of light produced in a fluorescent tube depends on factors;
(i) coating inside the tube; and (ii) the nature ype of gas in the tube.