Physical laboratory experiments : mechanics, optics and heat (1917)
Goodwin, H. M. (Harry Manley), 1870- · Boston : G. H. Ellis Co., Printers · leaf 108
rmature of an electromagnet. The slits are so con-structed and adjusted that each time the armature is attracted METRONOME PENDULUM 105 to the magnet, the slit S2 uncovers the slit Si and allows aflash of light to pass to the pendulum beyond. This is madeto occur once every second by connecting the… … Flff. 38. Fig. 39. seen reflected in the mirror M of the pendulum. If thependulum is at rest and the magnet set in operation, a flashwill be seen in the telescope once every second. If thependulum is swinging, the flash will occur only when thependulum and the clock come into coincidence.…
Physics · Mechanics
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