COLOR VISION TEST

Currently certified for color blind shall be declared to be necessary for some jobs such as doctors, pilots, chemists, electrical, interior design experts, graphic and so forth. This certification is required in order to prevent negligence / accidents at work due to disturbances in color vision. Accidents can be detrimental to the person concerned or other residents. To get a driver's license in some countries there are allowed but not for public transport drivers, bus or taxi. If it becomes an interior design expert will have difficulty on color perception. However, not all jobs require independent feasibility color blind.

BLACK HOLE

Black hole is an object that its density is very high so that can trap light forever. This is a very interesting electronic effects seen from the nature of light gravity. When the frequency is concerned with photons moving towards the earth increases, the frequency of photons moving away from Earth must diminish.