Question
Question: The largest distance between the inter atomic planes of a crystal is 10<sup>–7</sup> cm. The upper l...
The largest distance between the inter atomic planes of a crystal is 10–7 cm. The upper limit for the wavelength of X-rays which can be usefully studied with this crystal is-
A
1 Å
B
2 Å
C
10 Å
D
20 Å
Answer
20 Å
Explanation
Solution
lmax = 2d = 2 × 10–9 m = 20 Å