Author Question: If the interplanar spacing of NaCl is 2.814 1010 m, what is the predicted angle at which X-rays of ... (Read 82 times)

tiffannnnyyyyyy · **on:** Jul 28, 2018

If the interplanar spacing of NaCl is 2.814 1010 m, what is the predicted angle at which X-rays of wavelength 0.140 nm will be diffracted in a first-order maximum?
a. 31.3
b. 7.20
c. 20.5
d. 14.4
e. 29.8

Question 2

The full moon by definition occurs
a. for only a day.
b. for 7-3/8 days.
c. only for an instant.
d. only once every month.