so it is the same when you put a maginifing glass up to a leaf- you make sure that the dot is as small as can be and you will have a hole in the leaf!
so this happen by you focusing all the light on spot that you want to burn - remember light gives off heat (same happens when youshine light at an angle toward a mirror)
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They are reflected at the angle of incidence.
90 degrees is the largest possible angle of incidence because it is then parallel to the face of the mirror and is grazing the mirror.
The angle is the same but on the other side of the perpendicular to the surface of the mirror at the point at which the light hits the mirror.
they are reflected at an equal opposing angle on a first-surface mirror. on a second surface (bathroom mirror) they are also reflected, but some are absorbed/disbursed by impurities and inconsistencies in the glass.
angle of incidence