Question

Parallax method is used :

• A. To measure distance
• B. To measure weight
• C. To measure Height
• D. To measure density

Hint:

Astronomers use the parallax method to measure the distance of nearby stars from Earth.

Answer 1

The Correct Option is A

Concept: The parallax method is a scientific technique used to measure the distance of nearby objects, especially stars and celestial bodies. It is based on the apparent shift in the position of an object when viewed from two different observation points. A greater parallax angle indicates a shorter distance, while a smaller angle indicates a larger distance.

Step 1: Understand the principle of parallax.
When the observer changes position, nearby objects appear to shift relative to distant backgrounds. This apparent shift is called parallax.

Step 2: Identify the quantity measured using parallax.
The parallax method is mainly used to determine: \[ \text{Distance} \] Hence, the correct answer is: \[ \boxed{(A)\ \text{To measure distance}} \]