Light incident normally on a plane mirror attached to a galvanometer coil refracts…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
Light incident normally on a plane mirror attached to a galvanometer coil refracts backward as shown in figure. A current in the coil produces a deflection of 3.5° of the mirror. The displacement of the reflected spot of light on a screen placed 1.0 m away is
- 27.5 m
- 48.9 cm
- 24.5 cm
- 12.2 m
Answer
(B) 48.9 cm
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