A double-slit experiment has slit spacing 0.12 mm. What should be the slit-to-screen distance L if the bright fringes are to be 5.0 mm apart when the slits are illuminated with 633-nm laser light?
A double-slit experiment has slit spacing 0.12 mm. What should be the slit-to-screen distance L if the bright fringes are to be 5.0 mm apart when the slits are illuminated with 633-nm laser light?
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Transcribed Image Text:A double-slit experiment has slit spacing 0.12 mm. What should be the slit-to-screen distance L if the bright fringes are
to be 5.0 mm apart when the slits are illuminated with 633-nm laser light?
Expert Solution
Concept and Principle:
- In a double-slit experiment, light waves are passed through two closely placed slits. This causes interference of the light and forms alternating bright and dark fringes on a screen with a maximum at the center.
- The bright fringes are formed due to constructive interference and dark fringes are formed due to destructive interference.
- The distance to mth bright fringe from the central maximum caused by constructive interference is given by,
Here m is the order of the maxima, λ is the wavelength of the source, L is the distance from the slit to the screen's center point, and d is the slit spacing.
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