Coherent light with single wavelength falls on two slits separated by 0.560 mm. In the resulting interference pattern on screen 1.20 m away, adjacent bright fringes are separated by 1.62 mm. What is the wavelength (in nanometers) of the light that falls on the slits? Use formula for the small angles of diffraction.

College Physics
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Chapter24: Wave Optics
Section: Chapter Questions
Problem 62AP: Light from a helium-neon laser ( = 632.8 nm) is incident on a single slit. What is the maximum width...
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Coherent light with single wavelength falls on two slits separated by 0.560
mm. In the resulting interference pattern on screen 1.20 m away, adjacent
bright fringes are separated by 1.62 mm. What is the wavelength (in
nanometers) of the light that falls on the slits? Use formula for the small
angles of diffraction.

Wave Nature of light
Constructive interference for a double slit:
d sine = m2, for m= 0,1, -1, 2, -2, .. (constructive)
For small angles of diffraction (0 < 10°) separation between consecutive
maximums:
Ym+1 - Ym =L
Transcribed Image Text:Wave Nature of light Constructive interference for a double slit: d sine = m2, for m= 0,1, -1, 2, -2, .. (constructive) For small angles of diffraction (0 < 10°) separation between consecutive maximums: Ym+1 - Ym =L
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