Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 20
t be found; and thusremembering that the reflection occurring at the mirror doubles the SLrotation of the beam of light, actual rotation of mirror is i tan =n^- In most cases the deflection is so small that the angle and its tangentdo not differ greatly, and then we may take the deflection as… … Fig. 8. scale in the mirror. The position of the cross wire in the eye-piece asseen upon the image of the scale, enables us to observe the deflectionof the needle. Gausss Proof of the Inverse Square Law.—The two expressions for the strength of field near a magnet, (p \.a ^oi Case (i) and M „ ^ .. y…
Electricity · Magnetism
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