In a ruby laser, an electron jumps from a higher energy level to ...

[panfilo]

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

Question 2

The color charge of leptons is
 
  A)
 
  violet.
  B)
 
  red.
  C)
 
  blue.
  D)
 
  zero.
  E)
 
  green.

[ilianabrrr]

Answer to Question 1

D

Answer to Question 2

D

[panfilo]

Thanks for the timely response, appreciate it

[connor417]

TYSM