Physics Review Question Unit: waves Year: 1989 Question#: 52 Question: Coherent light of wavelength 6.4 x 10-7 meter passes through two narrow slits producing an interference pattern on a screen with the first order bright bands 2.0 x10-2 meter from the central maximum. The screen is 4.0 meters from the slits. What is the distance between the slits? (1 ) 2.6 x 10-6 meter (2 ) 3.2 x 10-9 meter (3 ) 1.3 x 10-4 meter (4 ) 7.8 x 103 meter What is this question really asking? Explanation by: Cory V (partly) [ Return to question menu ] Answer 1 2.6 x 10-6 meter INCORRECT Try this formula where = wavelength d = the distance between the slits x = the distance from the central maximum to the first order maximum L = the distance from the slits to the screen return to top Answer 2 3.2 x 10-9 meter INCORRECT Try this formula where = wavelength d = the distance between the slits x = the distance from the central maximum to the first order maximum L = the distance from the slits to the screen return to top Answer 3 1.3 x 10-4 meter CORRECT You used correctly. where = wavelength d = the distance between the slits x = the distance from the central maximum to the first order maximum L = the distance from the slits to the screen return to top Answer 4 7.8 x 103 meter CORRECT Try this formula where = wavelength d = the distance between the slits x = the distance from the central maximum to the first order maximum L = the distance from the slits to the screen return to top What's this question really asking? What is the distance between two slits, if the coherent light of wavelength 6.4 x 10 to -7-2return to top |
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