Respuesta :
b) 50 degrees
incident angle = reflected angle BUT grazing angle is given as 40 so incident angle taken from the normal at right angles to the mirror is 50
a) 40 degrees
When a light wave reflects off a mirror, it must obey the
law of reflection - angle of incidence is equal to angle of reflection. Â
If the angle of incidence is 40 degrees, the angle of reflection is 40