Electromagnetic Theory-Diffraction (CSIR Physical Sciences): Questions 1 - 1 of 1
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Question number: 1
» Electromagnetic Theory » Diffraction
Appeared in Year: 2014
When laser light of wavelength falls on a metal scale with 1 mm engravings at a grazing angle of incidence, it is diffracted to from a vertical chain of diffraction sports on a screen kept perpendicular to the scale. If the wavelength of the laser is increase by 200 nm, the angle of the first – order diffraction spot changes from to – (December)