Which metal is used in the florescent tubes and bulb of thermometer?
Which metal is used in the florescent tubes and bulb of thermometer?
فلوروسینٹ ٹیوب اور تھرمامیٹر کے بلب میں کون سی دھات استعمال ہوتی ہے؟
Explanation
Mercury (Hg) is used in thermometers.
Because it expands and contracts consistently with temperature changes.
It providing accurate readings.
It also emits ultraviolet light in fluorescent tubes when electrically excited.