An instructor wishes to determine the wavelength of the light in a laser beam. to do so, he directs the beam toward a partition with two tiny slits separated by 0.170 mm. an interference pattern appears on a screen that lies 4.95 m from the slit pair. the instructor's measurements show that two adjacent bright interference fringes lie 1.60 cm apart on the screen.
what is the laser's wavelength (in nm) ?
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Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.
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Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?
Answers: 3
An instructor wishes to determine the wavelength of the light in a laser beam. to do so, he directs...
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