Two Planes of Atoms in a Crystal Are Separated by 3.25

question 45

Multiple Choice

Two planes of atoms in a crystal are separated by 3.25 × 10^-10 m. Light of what wavelength would show constructive interference at an angle of 17.5 degrees relative to the crystal surface?

• A) 3.9 × 10^-10 m
• B) 4.9 × 10^-9 m
• C) 9.75 × 10^-10 m
• D) 1.46 × 10^-10 m
• E) 1.95 × 10^-10 m

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