Statement I X-ray astronomy is possible only from satellites orbiting the earth.

Question

Each of these questions contains two statements : Statement 1 (Assertion) and Statement II (Reason). Each of these questions also has four alternative choices, only one of which is correct answer. You have to select the correct choice in the codes (a), (b), (c) and (d) in the given below 

(a) Statement I is true, Statement II is true; Statement II is not a correct explanation of Statement I 

(b) Statement I is true, Statement II is false 

(c) Statement I is false, Statement II is true 

(d) Statement I is true, Statement II is true; Statement II is a correct explanation of Statement I

Statement I X-ray astronomy is possible only from satellites orbiting the earth. 

Statement II Efficiency of X-rays telescope is large as compared to any other telescope. 

Answer 1

The correct option is (b) Statement I is true, Statement II is false.

Explanation:

The earth's atmosphere is transparent to visible light and radiowaves but absorbs X-rays. Thus, X-rays telescope cannot be used on surface o{ the earth.