Question

In the given figure two plane mirrors M1 and M2 are inclined at an angle of θ with each other. If the reflected ray suffers a net deviation of 200 degrees then what will be the value of (θ+X) in degrees ?

• A. 340
• B. 240
• C. 260
• D. 360

Answer 1

The correct option is B 240

If deviation suffered is 200 then we know that
$360-2\theta =netdeviation360-2\theta =200\theta =360-200/2\theta =80Also,X+\delta =360SoX+200=360X=160So(X+\theta )=160+80={240}^0$