Question

two plane mirror inclined at an angle 80 degree. a ray of light is incident on one of the mirror. the ray will go total deviation

Answer 1

Dear Student,

◆ Answer -

Total deviation of light ray = 160°

● Explanation -

Given that 2 plane mirrors are inclined at an angle 80 degree. Suppose a ray of light is incident on 1st mirror at angle i. Hence, deviation at 1st mirror is 2i. Now this ray will incide on 2nd mirror at angle 80-i. So deviation at 2nd mirror is 2(80-i) = 160-2i. Hence, total deviation of light ray will be 2i + 160-2i = 160°.

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Answer 2

Answer:

160 degree

Explanation:

Given that 2 plane mirrors are inclined at an angle 80 degree. Suppose a ray of light is incident on 1st mirror at angle i. Hence, deviation at 1st mirror is 2i. Now this ray will incide on 2nd mirror at angle 80-i. So deviation at 2nd mirror is 2(80-i) = 160-2i. Hence, total deviation of light ray will be 2i + 160-2i = 160°.