Two Sources of Light Illuminate a Double Slit Simultaneously

question 13

Multiple Choice

Two sources of light illuminate a double slit simultaneously. One has wavelength 570 nm and the second has an unknown wavelength. The m = 5 bright fringe of the unknown wavelength overlaps the m = 4 bright fringe of the light of 570 nm wavelength. What is the unknown wavelength?

• A) 456 nm
• B) 326 nm
• C) 380 nm
• D) 713 nm

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