Light of Wavelength $\lambda$ Is Normally Incident on a Diffraction Grating G

question 40

Multiple Choice

Light of wavelength $\lambda$ is normally incident on a diffraction grating G. On the screen S, the central line is at P and the first order line is at Q, as shown. The distance between adjacent slits in the grating is:

• A) 3\(\lambda\)/5
• B) 3\(\lambda\)/4
• C) 4\(\lambda\)/5
• D) 5\(\lambda\)/4
• E) 5\(\lambda\)/3

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