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

question 71

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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