X-Rays Are Directed Toward a Crystal $\circ$ for Certain Crystallographic Planes

question 19

Multiple Choice

X-rays are directed toward a crystal.The first order diffraction peak appears at 11 ^$\circ$ for certain crystallographic planes.The separation between the planes is 0.512 nm.What is the wavelength of the x-rays?

• A)0.312 nm.
• B)0.216 nm.
• C)0.183 nm.
• D)0.195 nm.
• E)0.140 nm

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