Two Wavelengths, 800 Nm and 600 Nm, Are Used Separately

question 11

Multiple Choice

Two wavelengths, 800 nm and 600 nm, are used separately in single-slit diffraction experiments. The diagram shows the intensities on a far-away viewing screen as function of the angle made by the rays with the straight-ahead direction. If both wavelengths are then used simultaneously, which point corresponds to the smallest angle at which the light on the screen is purely 800-nm light?

• A) A
• B) B
• C) C
• D) D
• E) E

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