Optics Question 72
Question: 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.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: C
Solution:
The earth’s atmosphere is transparent to visible light and radio waves, but absorbs X-rays.
Therefore X-rays telescope cannot be used on earth surface.
