Author Question: Which of the following statements about X-rays and radio waves is not true? A) X-rays have ... (Read 98 times)

Bernana · **on:** Jul 27, 2018

Which of the following statements about X-rays and radio waves is not true?

A) X-rays have shorter wavelengths than radio waves.
B) X-rays and radio waves are both forms of light, or electromagnetic radiation.
C) X-rays have higher frequency than radio waves.
D) X-rays have higher energy than radio waves.
E) X-rays travel through space faster than radio waves.

Question 2

Why do we see a gravitational redshift in the spectrum of the Sun?

A) Gravity makes light heavy, causing it to appear redder.
B) Because of gravity, the Sun is always moving away from us, so we see a redshift.
C) Time runs slower on the Sun than on Earth, making lines in the solar spectrum have lower frequency and hence longer wavelength than normal.
D) Spacetime curvature allows red photons of light to escape the Sun more easily than blue photons, leading to an apparent redshift.