White Light Is Passed Through a Diffraction Grating That Has

question 9

Multiple Choice

White light is passed through a diffraction grating that has 2.50 × 10⁵ lines/m. On each side of the white central maximum, a spectrum of colors is observed. What is the wavelength of the light observed at an angle of 7.00° in the first-order bright fringes?

• A)487 nm
• B)589 nm
• C)632 nm
• D)668 nm
• E)731 nm

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