Question
Physics Question on Atoms
X-ray astronomy is possible only from satellites orbiting the earth. Efficiency of X-rays telescope is large as compared to any other telescope.
A
If both assertion and reason are true and reason is the correct explanation of assertion
B
If both assertion and reason are true but reason is not the correct explanation of assertion
C
If assertion is true but reason is false
D
If both assertion and reason are false
Answer
If assertion is true but reason is false
Explanation
Solution
The earth?? atmosphere is transparent to visible light and radio waves, but absorbs X−rays. Therefore X− rays telescope cannot be used on earth surface.