Length of normal is defined as the length of the normal between the point where the normal is drawn on the curve and the point where the normal intersects the y -axis
False
Length of normal is defined as the length of the normal between the point where the normal is drawn on the curve and the point where the normal intersects the x -axis . In the question it is given as y - axis. So the given statement is wrong.
In the figure, it is the length of the line segment PN