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Assertion: X-ray astronomy is possible o...

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.

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The correct Answer is:
C
The earth's atmosphere is transparent to visible light and radio waves, but absorbs X-rays. Therefore X-rays telescope acannot be used on earth surface.
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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.

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