Geometry/Angle of Incidence and Normals
Sir i know it is not related to your question . But sir it is indirectly anywhere in mathematics it is related. Sir my question is-> in first law of reflection why normal is drawn sir and what is the use of that angle of reflection and angle of incident
And sir , while reflection no normal is formed. Then sir what is the use of it.Normal means perpendicular line.
Sir i know that it is not more related because laws of reflection are not in maths they are in physics. But sir, here my doubt is why pupendicular line is drawn called normal and what is the use of angles in laws of reflection.
Sir please dont reply out of my expertise.
The normal line is a line of reference. It allows laws like "the angle of incidence is equal to the angle of reflection" to be made very simple, because we measure the angles relative to the normal line. There is no directionality of the normal line, which makes it easier to use than the edge of the material in calculations and laws. However, it may be counterintuitive at first because the normal line does not physically exist.