Question

X-rays from a copper X-ray tube (λ = 1.54 Å) were diffracted at a scattering angle of 14.22° by a crystal of silicon. Assuming first-order diffraction (n = 1), what is the interplanar spacing in silicon in Å? (1 Å = 10⁻¹⁰ m)

This is what am i working on, but the answer came out is not correct.
What am i mixing in this problem?

Answer 1

313.52 pm

Step-by-step explanation:

Perhaps you should check your working:


`(1 * 154)/(2 * 0.2456)`

≈ 313.52

(I have used a calculator lol, my arithmetic skills are terrible when I am not dealing with numbers in scientific notations)

Hope this helps :)