Deflection (physics)

An object hitting a surface is an example of deflection.

Deflection, in physics, refers to the change in an objects' acceleration as a consequence of contact (collision) with a surface or the influence of a field. Examples of the former include a ball bouncing off the ground or a bat; examples of the latter include a beam of electrons used to produce a picture, or the relativistic bending of light due to gravity.

An object's deflective efficiency can never equal or surpass 100%. For example, a mirror will never reflect exactly the same amount of light cast upon it. Also, on hitting the ground, a ball previously in free-fall (meaning no force other than gravity acted upon it) will never bounce back up to the place where it first started to descend. This is a consequence of thermodynamics, where, for every action, some energy gets converted into alternative forms of energy or is absorbed by the deformation of the objects involved in the collision..

See also

This article is issued from Wikipedia - version of the 1/26/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.