[" Assertion : X-ray astronomy is possible only from "],[" satellites orbiting the earth."],[" Reason : Efficiency of X-rays telescope is large as "],[" compared to any other telescope."]

Assertion: X-ray astronomy is possible only from satellites orbiting the earth. Reasion: Efficiency of X-rays telescope is large as compared to any other telescope.

Assertion: X-ray astronomy is possible only from satellites orbiting the earth. Reasion: Efficiency of X-rays telescope is large as compared to any other telescope.

Assertion: X-ray astronomy is possible only from satellites orbiting the earth. Reasion: Efficiency of X-rays telescope is large as compared to any other telescope.

(A) X-ray astronomy is possible only from satellites orbiting the earth. (R) : Efficiency of X-rays telescope is large as compared to any other telescope

A : Optical and radio telescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. R : Atmosphere absorbs X-rays, while visible and radiowaves can penetrate it.

A : Optical and radio telescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. R : Atmosphere absorbs X-rays, while visible and radiowaves can penetrate it.