In an X-ray diffraction experiment using X-rays of = 0.500 1010 ...

[CBme]

In an X-ray diffraction experiment using X-rays of  = 0.500  1010 m, a first-order maximum occurred at 5.00. Find the crystal plane spacing.
 a. 2.87  1010 m
  b. 1.36  1010 m
  c. 6.24  109 m
  d. 1.93  109 m
  e. 5.74  109 m

Question 2

The Moon always presents the same face to Earth because
 a. the Moon does not rotate on its axis.
  b. the Moon rotates on its axis at same rate at which it revolves around Earth.
  c. the Moon revolves around the Sun in one month.
  d. none of these

[Joc]

Answer to Question 1

a

Answer to Question 2

b

[CBme]

Gracias!

[nyrave]

Excellent