In a fluorescent tube, how are the atoms in the tube excited?
As there is a potential difference in the fluorescent tube. Electrons will flow from negative to the positive . These electrons collide with the orbital electrons in the atoms of the fluorescent tube. As there is an energy transfer from the free moving electron to the orbital electrons. The orbital electrons gain energy and become excited. They now exist on a higher enery level until they de-excite.
SW
Related Physics A Level answers
All answers ▸What is the difference between a vector and a scalar quantity?
A wire has length l, cross-sectional area a, resistivity p and resistance R. It is compressed to a third of its original length but its volume and resistivity are constant. Show its new resistance is R/9.
How do you find the components of a vector?
A car of mass m travelling with a velocity v comes to rest over a distance d in time t. The constant frictional force acting on the car while it is braking is found using: