excitation of gas molecules
conduction of solar energy
refraction of light by gas molecules
thermal agitation of electron in the tubes
Explanation
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Discussions (10)
ChatGPT's answer:
Fluorescent tubes produce light by
A. excitation of gas molecules 
Why this is correct:
An electric current passes through low-pressure mercury vapour.
The gas molecules get excited and emit ultraviolet radiation.
The UV hits the phosphor coating, which then gives off visible light.
Why the others are wrong:
B 
nothing to do with solar energy
C refraction doesn’t produce light
D that’s how filament bulbs work, not fluorescent tubes
It can't be excitation of gas molecules cos excitation of electron does not give off photon of energy but absorbs. Only movement to the ground level gives of photon of light. I go with D
