NCERT Question 13 - Chapter 16 Class 8 - Light
Last updated at Dec. 16, 2024 by Teachoo
NCERT Questions
Last updated at Dec. 16, 2024 by Teachoo
Transcript
According to the question, reflected angle is at an angle of 90° to incident ray ∴ ∠AOB = 90° ∠i + ∠r = 90° …(1) According to the law of reflection, Angle of incidence = Angle of reflection ∠i = ∠r Putting ∠i = ∠r in equation (1) ∠i + ∠i = 90° 2 ∠i = 90° ∠i = 90/2 ∠i = 45° ∴ Angle of incidence = 45°