Which of the mirrors is converging: concave or convex?

Which of the mirrors is diverging: concave or convex?

What is a lens? Distinguish between a convex lens and a concave lens. Which of the two is a converging lens: convex and lens or concave lens?

An object is placed 15cm from a mirror and an image is captured on the screen with magnification 2. Calculate the focal length of the mirror and determing if it is concave or convex.

Which spherical mirror is converging and which one is diverging ?

Obtain an expression for mirror formula (either for concave or convex mirror).

a) An object is placed 10 cm from a lens of focal length 5 cm. Draw the ray diagrams to show the formation of image if the lens is (i) converging, and ii) diverging. b) State one practical use each of convex mirror, concave mirror, convex lens and concave lens.