LED and Laser diode - class-XII

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Multiple Choice

Students in a lab are trying to determine the wavelength of laser light by shining the laser through two narrow slits separated by $9.60$ micrometers toward a screen $4.00$ meters away. The first order bright fringes are $23.0$ centimeters from the center fringe.
What wavelength do the students determine?

  1. $680 nm$
  2. $552 nm$
  3. $883 nm$
  4. $167 nm$
  5. $8,832 nm$
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