Question

Assertion (A) : When we see stars, we are apparently peeping into the past.

Reason (R) : What we see today is an object whose emitted light started its journey millions of years back reaching our eyes now.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation for Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

Light from far stars takes years to reach us, so we see them as they were. R explains A.

Answer 1

The Correct Option is A

Step 1: Understand the assertion:
Light travels at a finite speed of about \( 3 \times 10^{8} \) m/s.
Stars are very far away, often many light years.
So the light reaching us left the star long ago, and we see the star as it was then.
Assertion (A) is true.

Step 2: Understand the reason:
Reason (R) says that the light we see now started its journey millions of years back.
For distant stars and galaxies this is a fact, because the distance is covered by light only after a very long time.
Reason (R) is true.

Step 3: Link the two statements:
The assertion says we look into the past. The reason gives the cause: old light is arriving now.
So (R) explains (A) directly.

Step 4: Why the other codes are wrong:
(B) says R is not the explanation, but it is the exact explanation.
(C) says R is false, and (D) says A is false. Both statements are true, so these are wrong.

Final Answer:
Both statements are true and R explains A, so the answer is (A). \[ \boxed{\text{(A)}} \]