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Two slits are separated by a distance of 0.5 mm and illuminated with light of =6000 Å . If the screen is placed 2.5 m , from the slits. The distance of the third bright image from the centre will be

Options

  1. A1.5 mm
  2. B3 mm
  3. C6 mm
  4. D9 mm

Correct answer

D. 9 mm

Step-by-step solution

Distance of nth bright fringe from the centre, y _ n = nD d aligned y ₃ & = 3 6000 10⁻¹⁰ 2.5 0.5 10⁻³ & =9 10⁻³ ~m & =9 ~mm aligned

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