Young's Double Slit Experiment Video Lessons

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Problem: Suppose the first-order maximum for monochromatic light falling on a double slit is at an angle of 9.5°.A. At what angle (in degrees) is the second-order maximum?B. What is angle (in degrees) of the first minimum?

FREE Expert Solution

Consider the equation for constructive interference for a double-slit:

dsinθ=mλ, where d is the distance between the slits, θ is the angle between the path and a line from the slits to the screen, m is the order of interference, and λ is the wavelength of the light. 

For destructive interference:

dsinθ=(m+12)λ

A.

The maximum occurs as a result of constructive interference.

We substitute m = 1 for the first-order maximum. 

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Problem Details

Suppose the first-order maximum for monochromatic light falling on a double slit is at an angle of 9.5°.

A. At what angle (in degrees) is the second-order maximum?

B. What is angle (in degrees) of the first minimum?

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