What is the formula for the fringe separation in a double-slit experiment?

What is the formula for the fringe separation in a double-slit experiment?

Correct Answer: β = λD/d

Step 1: Understand that the double-slit experiment involves light passing through two narrow openings (slits).
Step 2: Know that when light passes through the slits, it creates a pattern of bright and dark spots on a screen. These spots are called fringes.
Step 3: The distance between two adjacent bright spots (or dark spots) on the screen is called fringe separation, represented by the symbol β.
Step 4: The formula for calculating fringe separation is β = λD/d.
Step 5: In this formula, λ (lambda) represents the wavelength of the light used, D is the distance from the slits to the screen, and d is the distance between the two slits.
Step 6: To use the formula, you need to know the values of λ, D, and d.
Step 7: Plug in the values into the formula to calculate the fringe separation (β).

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