Question

A type of electromagnetic wave has wavelength 50 Å. 

1. Name the wave.
2. What is the speed of this wave in vacuum?
3. State one use of this type of wave. 

Answer 1

1. The wave is an X-ray.
2. Its speed in vacuum is \[3 \times 10^{8}\ \mathrm{m\,s^{-1}}\].
3. X-rays are used to image bones and detect fractures.