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Back to 4.3 Double-Slit Diffraction

4.3 Exercise 6

Avg difficulty 2.5

Light of wavelength 500 nm falls normally on 50 slits that are 2.5×10−3mm2.5 \times 10^{−3} \text{mm} wide and spaced 5.0×10−3mm5.0 \times 10^{−3} \text{mm} apart. How many interference fringes lie in the central peak of the diffraction pattern?

OpenStax University Physics Volume 3, 4.3 Double-Slit Diffraction, exercise 6

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Adapted from University Physics Volume 3 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 3. Imported at revision db44eb9.