A photon is produced whenever an electron in a higher-than-normal orbit falls back to its normal orbit. During the fall from high energy to normal energy, the electron emits a photon -- a packet of energy -- with very specific characteristics.
Sleeping Dogs. Sleeping Dogs is an open-world third person action game developed by United Front Games and published by the Square Enix London Studios. Originally, the game was going to be the third in the True Crime series, but Activision canceled the game on February 9, 2011.
Older senior dogs always sleep more than younger dogs, and 20 hours or more a day of sleeping does not mean an old dog is ill; theyâre just tired out. Although all dogs begin to slow down and rest more as they grow older, there are some medical conditions that may cause your dog to sleep too much.