A Light Source Simultaneously Emits Light of Two Wavelengths,480 Nm

question 22

Multiple Choice

A light source simultaneously emits light of two wavelengths,480 nm and 560 nm,respectively.The source is used in a double-slit interference experiment where the slit spacing is a 0.040 mm,and the distance between double slits and the screen is 1.2 m.What is the separation between the second-order bright fringes of the two wavelengths as they appear on the screen? (1 nm = 10^-9 m)

• A)0.16 cm
• B)0.32 cm
• C)0.48 cm
• D)0.64 cm

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