Question

In the parallax method, what type of object is commonly used to determine the focal point of the lens.

पर्याय

• A point source of light

• A candle flame

• A flat mirror

• A convex mirror

Answer 1

A point source of light

Explanation:

The parallax method is used to determine the focal length of a lens in which a distant object with a well defined point source of light like a star is taken.