JAMB - Physics (2020 - No. 20)
Two mirrors of the same length are arranges as show in the diagram. A ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through
220\(^o\)
200\(^o\)
210\(^o\)
180\(^o\)
คำอธิบาย
Deviation angle
= \(\theta_1 + \theta_2\) = 50 + 50 + 40 + 40
= 180\(^o\)