Question

Which of the following make the separation between fringes greater in the two slit interference experiment?...

Which of the following make the separation between fringes greater in the two slit interference experiment? (Select all that apply.)

Wider slits.Smaller separation of the two slits.Larger separation of the two slits.Narrower slits.

PRACTICE IT

Use the worked example above to help you solve this problem. A screen is separated from a double-slit source by 1.22 m. The distance between the two slits is 0.0292 mm. The second-order bright fringe (m = 2) is measured to be 4.60 cm from the centerline.

(a) Determine the wavelength of the light.
nm

(b) Determine the distance between adjacent bright fringes.
cm

EXERCISEHINTS:  GETTING STARTED  |  I'M STUCK!

Suppose the same experiment is run with a different light source. If the first-order maximum is found at 2.00 cm from the centerline, what is the wavelength of the light?
λ =  nm

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