The mercury atoms in a fluorescent tube are excited and then emit photons in the ultraviolet region of the elecrtomagnetic spectrum. Explain how the mercury atoms become excited.

The mercury atom is excited one of its electrons goes from an upper electron shell to a lower electron shell thanks to some energy that it recives from the outside. When an atom is excited it is instable so the electron will go back to its initial shell. This will cause a loss of enregy in the form of a photon

Answered by Marie B. Physics tutor

4021 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

Electrons moving in a beam have the same de Broglie wavelength as protons in a separate beam moving at a speed of 2.8 × 10^4 m/s . What is the speed of the electrons?


Why does current split between branches of a parallel circuit, but voltage remains the same for each branch?


What is a potential divider?


How am I going to remember all of the particles I need to know? (A-level Physics)


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences