What is the maximum number of bright fringes that can be observed in a double-sl

What is the maximum number of bright fringes that can be observed in a double-slit experiment with a given wavelength? (2023)

What is the maximum number of bright fringes that can be observed in a double-slit experiment with a given wavelength? (2023)

Step 1: Understand that a double-slit experiment creates bright and dark fringes on a screen due to interference of light.
Step 2: Know that bright fringes occur at specific angles where the light waves from the two slits meet in phase.
Step 3: The condition for bright fringes is given by the formula: d * sin(θ) = n * λ, where d is the slit separation, θ is the angle, n is the order of the fringe (0, 1, 2, ...), and λ is the wavelength of the light.
Step 4: Realize that the maximum value of n (the order of the fringe) is limited by the maximum angle θ, which can be 90 degrees (sin(90°) = 1).
Step 5: Rearrange the formula to find the maximum n: n_max = d / λ.
Step 6: This means the maximum number of bright fringes is determined by how many times the wavelength fits into the slit separation.

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