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If the wavelength of light used in Young's experiment is 600 nm, what is the fri

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Question: If the wavelength of light used in Young\'s experiment is 600 nm, what is the fringe width when the distance between the slits is 0.1 mm and the distance to the screen is 2 m?

Options:

  1. 0.03 mm
  2. 0.06 mm
  3. 0.12 mm
  4. 0.15 mm

Correct Answer: 0.06 mm

Solution: 

Fringe width (β) = (λD)/d = (600 x 10^-9 * 2)/(0.1 x 10^-3) = 0.012 mm = 0.06 mm.

If the wavelength of light used in Young's experiment is 600 nm, what is the fri

Practice Questions

Q1
If the wavelength of light used in Young's experiment is 600 nm, what is the fringe width when the distance between the slits is 0.1 mm and the distance to the screen is 2 m?
  1. 0.03 mm
  2. 0.06 mm
  3. 0.12 mm
  4. 0.15 mm

Questions & Step-by-Step Solutions

If the wavelength of light used in Young's experiment is 600 nm, what is the fringe width when the distance between the slits is 0.1 mm and the distance to the screen is 2 m?
  • Step 1: Identify the given values from the problem. The wavelength of light (λ) is 600 nm, the distance between the slits (d) is 0.1 mm, and the distance to the screen (D) is 2 m.
  • Step 2: Convert the units to be consistent. Convert 600 nm to meters: 600 nm = 600 x 10^-9 m. Convert 0.1 mm to meters: 0.1 mm = 0.1 x 10^-3 m.
  • Step 3: Write the formula for fringe width (β): β = (λD) / d.
  • Step 4: Substitute the values into the formula. β = (600 x 10^-9 m * 2 m) / (0.1 x 10^-3 m).
  • Step 5: Calculate the numerator: 600 x 10^-9 m * 2 m = 1200 x 10^-9 m.
  • Step 6: Calculate the denominator: 0.1 x 10^-3 m = 0.0001 m.
  • Step 7: Divide the numerator by the denominator: β = (1200 x 10^-9 m) / (0.0001 m).
  • Step 8: Perform the division: β = 0.012 m.
  • Step 9: Convert the result back to mm: 0.012 m = 12 mm.
  • Step 10: The final answer for fringe width is 12 mm.
  • Young's Double Slit Experiment – This experiment demonstrates the wave nature of light through the interference pattern created by two coherent light sources.
  • Fringe Width Calculation – The fringe width (β) is calculated using the formula β = (λD)/d, where λ is the wavelength, D is the distance to the screen, and d is the distance between the slits.
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