In a Ruby Laser, an Electron Jumps from a Higher

question 6

Multiple Choice

In a ruby laser, an electron jumps from a higher energy level to a lower one. If the energy difference between the two levels is 1.8 eV, what is the wavelength of the emitted photon?

• A)350 nm
• B)470 nm
• C)650 nm
• D)690 nm
• E)960 nm