Question

Plz tell all the three parts, No spam. Plz attempt the question carefully. It's urgent.
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Answer 1

Answer:

since by law of reflection angle of incidence is equal to the angle of reflection so,angle i is equal to angle r

Answer 2

Answer:

1-40° angle of incidence equal to anhle of reflection

2-40°(-do-)

3- i am not sure

i think it is 40+40°80