Question

1. science fiction
8. TV. serial
9. stage performance
19. lunch-box
11, water-bottle
12. petrol-engine (make it nominal compound)
please fast it's very urgent ​

Answer 1

Answer:

According to first law of reflection incident and reflected angles are equal. So, reflected angle will be 30 degrees. Reflected angle and angle B together make up the angle between normal and the surface that is 90 degrees. So, Angle b = (90 - reflected angle), which is (90-30) = 60 degree.