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

MCQ▾

Question

When laser light of wavelength λ 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 50 to – (December)

Choices

Choice (4) Response
a.

5.140

b.

5.210

c.

5.0180

d.

6.600

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