Problem: Draw the pattern you observed on the screen for the red laser. Which aspect of your drawing is due to double-slit interference, and which is due to single-slit? How can you tell? Indicate these on your drawing.What happens to the pattern when you:a. Increase the wavelength (What happen for double-slit pattern and single-slit pattern ?)b. Slits are moved closer (What happen for double-slit pattern ?) c. Each slit is widened (What happen for single-slit pattern?)

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FREE Expert Solution

Both the double-slit interference pattern and single-slit diffraction patterns are observable. A diffraction pattern is formed in a double-slit when the slits are wide enough.

Single-slit diffraction,

a sin θ = nλ

Double-slit interference pattern (maxima condition),

d sin θ = mλ

where, a = slit width and d = slit's separation distance.  

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Problem Details

Draw the pattern you observed on the screen for the red laser. Which aspect of your drawing is due to double-slit interference, and which is due to single-slit? How can you tell? Indicate these on your drawing.

What happens to the pattern when you:

a. Increase the wavelength (What happen for double-slit pattern and single-slit pattern ?)

b. Slits are moved closer (What happen for double-slit pattern ?) 

c. Each slit is widened (What happen for single-slit pattern?)