Jayasree posted an Question
February 08, 2022 • 23:30 pm 30 points
  • CSIR NET
  • Physical Sciences

Q25. when laser light of wavelength 2 falls on a metal scale with 1 mm engravings at a grazing angle of incidence, it is diffracted to form a

Q25. When laser light of wavelength 2 falls on a metal Scale with 1 mm engravings at a grazing angle of incidence, it is diffracted to form a vertical chain of diffraction spots on a screen kept perpendicular to the scale. If the wavelength of the laser is increased by 200 nm, the angle of the first-order diffraction spot changes from 5 to (a) 6.60 (b) 5.140 (c) 5.018 (d) 5.210 Ans

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