Question

An X-ray has a wavelength of 0.010 Å. Its momentum is.

• A. 2.126 $\times$10^–23 kg-m/sec
• B. 6.626 $\times$10^-22 kg-m/sec
• C. 3.456 $\times$ 20^–25 kg-m/sec
• D. 3.313 $\times$10^–22 kg-m/sec

Answer 1

Answer: (B)

6.626 $\times$10^-22 kg-m/sec

Answer 2

$p = \frac{h}{\lambda} = \frac{6.6 \times 10^{- 34}}{0.01 \times 10^{- 10}} = 6.6 \times 10^{- 22}kg - m/\sec$.