A Young's Double-Slit Apparatus Is Set Up

question 36

Multiple Choice

A Young's double-slit apparatus is set up.A screen is positioned 1.60 m from the double slits,and the spacing between the two slits is 0.040 0 mm.The distance between alternating bright fringes is 1.42 cm.What is the light source wavelength? (1 nm = 10^-9 m)

• A)710 nm
• B)490 nm
• C)280 nm
• D)355 nm

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