The point on the principal axis of a convex lens, such that rays of light starting from it on passing through the lens, move parallel to the principal axis is called :
The point on the principal axis of a convex lens, such that rays of light starting from it on passing through the lens, move parallel to the principal axis is called :
The correct option is A first focal point
The explanation for the correct answer:
(a) first focal point
It is the point where the rays starting from it when passes through the lens go parallel to the axis.
The explanation for the incorrect option:
(b) second focal point
It is the point of the image when the object is placed at infinity.
(c) optical center
It is the point that is the center of the optical center.
(d) aperture of lens
It is the body of the lens from which the rays get reflected.
Thus the point on the principal axis of a convex lens, such that rays of light starting from it on passing through the lens, move parallel to the principal axis is called the first focal length.
first focal point
The explanation for the correct answer:
(a) first focal point
It is the point where the rays starting from it when passes through the lens go parallel to the axis.
The explanation for the incorrect option:
(b) second focal point
It is the point of the image when the object is placed at infinity.
(c) optical center
It is the point that is the center of the optical center.
(d) aperture of lens
It is the body of the lens from which the rays get reflected.
Thus the point on the principal axis of a convex lens, such that rays of light starting from it on passing through the lens, move parallel to the principal axis is called the first focal length.
