Question

d. Why can an X-ray telescope not be based on the earth​

Answer 1

Answer:

The Earth's atmosphere blocks all X-rays from space, so space telescopes must be used to observe in these wavelengths. X-rays have such high energy that the typical reflecting telescope design used for radio, infrared and optical telescopes cannot be used as the X-rays would just penetrate into the mirror.

Answer 2

Explanation:

Earth's atmosphere is opaque to X-rays, and hence blocks them. Because of atmospheric absorption, X-ray telescopes must be carried to high altitudes by rockets or balloons or placed in orbit outside the atmosphere.