$A$ plane mirror produces a magnification of

$A$ ray of light is incident on a concave mirror after passing through the centre of curvature. What is the angle of incidence (in $°$)?

What is meant by power of a lens? Define its $SI$ unit. You have two lenses $A$ and $B$ of focal lengths $+10\, cm$ and $-10\, cm$ respectively. State the nature and power of each lens. Which of the two lenses will form a virtual and magnified image of an object placed $8\, cm$ from the lens? Draw a ray diagram to justify your answer.

Copy the given figure and complete it to show the formation of the image of the object $AB$. Name the lens used in the figure.

Show that the mirror formula for spherical mirrors also holds for a plane mirror.

$A$ convex mirror can be used to see a large image of a small object.