Question 37: NCERT Solutions for 12th Class Physics: Chapter 9-Ray Optics and Optical Instruments
Light incident normally on a plane mirror attached to a galvanometer coil retraces backwards as shown in figure. A current in the coil produces a deflection of 3.5° of the mirror. What is the displacement of the reflected spot of light on a screen placed 1.5 m away?
If the mirror deflect by 3.5°, the reflected light deflect by 7°, deflection of the spot d can be calculated.
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NCERT Solutions for 12th Class Physics: Chapter 9-Ray Optics and Optical Instruments