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In front of a lecture hall, a coherent beam of monochromatic light from a helium-neon laser (λ= 632.8 nm) illuminates a double-slit. From there it travels a distance of 20.0 m to a mirror at the back of the hall, and returns the same distance to a screen.
(a) In order that the distance between interference maxima be 10.0 cm, what should be the distance between the two slits?
(b) State what you will see if the lecturer slips a thin sheet of cellophane over one of the slits. The path through teh cellophane contains 2.5 more waves than a path through air of the same geometric thickness.
A 5* 10^2 kg hot air balloon takes off from rest at the surface of the earth. The non conservative wind and lift forces take the balloon up, doing +9.70*10^4J of work on the balloon in the process. At what height above the surface of earth does th..
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A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 664 m/s. The gun is pointed directly at the center of the bull's-eye, however the bullet strikes the target0.023 m below the center. What is the horizontal distance among ..
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