Question

Define the principal focus of a concave mirror.....​

Answer 1

${\tt{\red{\underline{\underline{\huge{Answer:}}}}}}$

The principle focus of concave mirror is a point on its principle axis to which all the light rays which are parallel and close to the axis, converge after reflection from the mirror.

Uses of convex mirrors:

1) Convex mirrors are used in rear view mirror in vehicles because the mirror can diverge a beam of light and create a virtual image.

2) Convex mirrors are used as reflectors in street lamps to diverge light over a larger area.

Answer 2

$\mathtt{\bf{\large{\underline {\red{Question}}}}}$

Define the principal focus of a concave mirror.

$\mathtt{\bf{\large{\underline {\red{Answer}}}}}$

➡️ The principal focus is defined as the point where a beam parallel to the principal axis appears to diverge converges from a point on the principal axis after passing through the lens.

➡️ Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror.

➡️ The rays traveling parallel to the principal axis of a mirror after reflection pass through a point F This point F is known as the principal focus of the concave mirror. It is a real point in front of a mirror.