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Engineering Physics by S. Mani Naidu

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Important Formulae

  1. Y = Y1 + Y2 = a1 sin ωt + a2 sin (ωt + ϕ)

     

  2. I = R2 = a21 + a22 + 2a1a2 cos ø

     

  3. Imax = (a1 + a2)2 = 4a2 if a1 = a2 = a

     

  4. Imin = (a1a2)2 = 0 if a1 = a2 = a
  5. xn images for nth bright fringe
  6. xn images for nth dark fringe
  7. Fringe width images
  8. δ = 2μt cosr images = nλ for bright interference fringes
  9. 2μt cos r = nλ for dark interference fringes
  10. for diameter of ...

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