A student holds a laser that emits 550 nm light. The beam passes through a grating with a pair of double slits, separated by 0.01 mm, which is attached to the front of the laser. The beam then falls perpendicularly on a screen 2 m away, creating an interference pattern. 1) How far, along the screen, from the central bright are the 30th and 31st bright fringes? 2) The student with the laser then starts to slowly move either toward or away from the screen. As they do, you notice that the 30th bright fringe slowly moves outward and after 5 seconds is now at the old location of the 31st bright fringe. Was the student moving toward or away from the screen? Explain. 3) How fast was the student moving?
A student holds a laser that emits 550 nm light. The beam passes through a grating with a pair of double slits, separated by 0.01 mm, which is attached to the front of the laser. The beam then falls perpendicularly on a screen 2 m away, creating an interference pattern. 1) How far, along the screen, from the central bright are the 30th and 31st bright fringes? 2) The student with the laser then starts to slowly move either toward or away from the screen. As they do, you notice that the 30th bright fringe slowly moves outward and after 5 seconds is now at the old location of the 31st bright fringe. Was the student moving toward or away from the screen? Explain. 3) How fast was the student moving?
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter35: Diffraction And Interference
Section: Chapter Questions
Problem 68PQ
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A student holds a laser that emits 550 nm light. The beam passes through a grating with a pair of double slits, separated by 0.01 mm, which is attached to the front of the laser. The beam then falls perpendicularly on a screen 2 m away, creating an interference pattern.
1) How far, along the screen, from the central bright are the 30th and 31st bright fringes?
2) The student with the laser then starts to slowly move either toward or away from the screen. As they do, you notice that the 30th bright fringe slowly moves outward and after 5 seconds is now at the old location of the 31st bright fringe. Was the student moving toward or away from the screen? Explain.
3) How fast was the student moving?
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