quiz11csoln - t given by N = N exp − t / since the number...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Quiz #11c: 1. [10 pts] An electrical discharge in a neon-filled tube maintains a steady population of 1.0 x 10 8 atoms in an excited state with a lifetime of μ =30 ns. How many photons are emitted per second from atoms in this state? Solution: The initial number of Atoms in the disharge tube = N 0 = 1.0 x 10 8 the rate of decay is given by R =− dN / dt = N / where N is the number of non decayed particles at some time
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: t given by N = N exp − t / since the number of atoms is maintained to N = N hence the rate of decay of atoms from excited state to ground state is R = N /= 3.33x10 15 sec − 1 every atom emits one photon to decay to the ground state , therefore the number of photon emitted by atoms in the discharge tube is R = 3.33x10 15 / sec...
View Full Document

This note was uploaded on 12/26/2011 for the course PHYSICS 270 taught by Professor Drake during the Fall '08 term at Maryland.

Ask a homework question - tutors are online