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Old Oct 3rd 2011, 08:20 PM   #1
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Rotation of plane mirror Experiment

In the experiment Rotation of Plane Mirror:

Reflection Lab Part A - YouTube

What are some physical applications of the results:

i.e. P = 1/2 Q

P - Angle of Rotation of Mirror

Q - Angle of Rotation of Reflected Ray

I think one example is so an automobile can see around a tight corner
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Old Oct 8th 2011, 11:36 PM   #2
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This principle is also used in mirror galvanometers where a tiny current causes a small deflection of a mirror. A beam of light is incident on this mirror and the reflected spot moves thru twice the angle making it easier to measure the deflection and hence the current. Do look it up.
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