Question

) If the angle of incidence is 20° the angle made by reflected ray with the

normal to the surface must be……………………

a) 20° b)70° c)10° d)40°​

Answer 1

If you want angle of reflection answer is 20 degree .
But if you want the angle between the surface and reflected ray answer is = 90-20 = 70

Answer 2

Answer:

angle of incidence is equals to angle of reflection.

if angle of incidence is 20°to the normal to the surface, angle of reflection will also be 20°

a). 20°