Answers

  • amb
  • Ambitious
2016-02-27T09:33:34+05:30
Let the angle of incidence as well the angle of reflection be x°.
Now,
As, Angle of incidence =Angle of reflection so,

x°+x°+120°=180°(as a plane surface is involved)
2x°+120°=180°
2x°=180°-120°
2x°=60°
x=60÷2
x=30°.

Therefore the angle of incidence as well the angle of reflection are 30° each...
0
2016-02-27T10:09:51+05:30
Let the angle of incidence as well the angle of reflection be y.
so,
As, we known Angle of incidence =Angle of reflection 
then,
y°+y°+120°=180°(as a plane surface is involved)
2y°+120°=180°
2y°=180°-120°
2y°=60°
y=60/2
y=30°.
hence ,the incident angle should be 30
°
0
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