In a powder diffraction experiment on BCC iron, the first peak occurs at 2𝜃 = 68**.**7°. The wavelength of X-rays is (in nm *to three decimal places*).

**Given: **The lattice parameter of iron = 0**.**287 nm.

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In a powder diffraction experiment on BCC iron, the first peak occurs at 2𝜃 = 68**.**7°. The wavelength of X-rays is (in nm *to three decimal places*).

**Given: **The lattice parameter of iron = 0**.**287 nm.

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See lessUsing Bragg's law nλ = 2dsinΘ λ = 2 *(a/square root of h2 + k2 +l2 )*sinΘ λ = 2 * (0.287/√2)*sin (68.7/2) λ = 0.229 nm

Using Bragg’s law nλ = 2dsinΘ

λ = 2 *(a/square root of h

^{2 }+ k^{2 }+l^{2 })*sinΘλ = 2 * (0.287/√2)*sin (68.7/2)

λ = 0.229 nm

See lessAt 4:50 Use Bragg's Law and find solution in video with explanation.

At 4:50

Use Bragg’s Law and find solution in video with explanation.

See lessCorrect answer is 0.229nm. @Digbijaya igit described it best. Thank you.

Correct answer is 0.229nm. digbijaya igit igit described it best. Thank you.

See less