The reflection of a wave is simply a process by which a wave, whether light, sound, infrared, or radio waves, hits an object and bounces off it. But this reflection looks quite different for a mirror than it does for a wall. Law of Reflection. When any wave, including light, hits a surface that is opaque, the light will mostly reflect off that surface. The law of reflection tells us how it bounces off that surface. When a wave is moving toward the surface, it's called the 'incident ray.' When it bounces off, it's call the 'reflected ray.'
Over the years I have met a lot of people in various gyms. Every now and again I would meet some one that would complain about one arm, leg or chest muscle being bigger than the other. In general neither both sides of the human body are equal, and any differences that you see are usually only spotted by yourself.
Ballistic stretching uses the momentum of a moving body or a limb in an attempt to force it beyond its normal range of motion. This is stretching, or warming up, by bouncing into (or out of) a stretched position, using the stretched muscles as a spring which pulls you out of the stretched position. full session of isometric stretching makes a lot of demands on the muscles being stretched and should not be performed more than once per day for a given group of muscles (ideally, no more than once every 36 hours).