8th Class Science Light Question Bank Light Summative Subjective Problems

  • question_answer
    What is the sum of angle of incidence, angle of reflection and angle of deviation equals to?

    Answer:

    We know that,\[d=180-2i\]or\[d=180-(i+r)\]                           \[[\because i=r]\text{ }\Rightarrow d+i+r=1800.\] Therefore, the sum of angle of incidence, angle of reflection and angle of deviation is equal to\[{{180}^{0}}\].


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