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.
Age is a major factor in how much a dog sleeps. Just as it is with people, a dog's sleeping patterns change throughout his life cycle, with more or less sleep needed at different stages of life. Healthy adult dogs in their prime of life generally average about 14 hours of sleep each day. Young puppies generally need 18 to 20 hours, while aging dogs also tend to sleep longer the older they get. Dogs who have a lot to do generally sleep less.