Real and Virtual image

Concave mirror has _____(negative/ positive) focal length.

A virtual image formed is always erect.

Images that cannot obtained on a screen are called virtual images.

For an object placed at the centre of curvature, the magnification of image produced by a concave mirror is always $+1$.

An object is placed at a distance of $10 \mathrm{cm}$ from a convex mirror of focal length $15 \mathrm{cm}$. Find the position of the image (in $\mathrm{cm}$).

Select the correct statement(s).

The ratio of the height of the image to the height of the object is known as _____.

Focal length of a concave mirror is $30 \mathrm{cm}$. If object is at a distance of $20 \mathrm{cm}$ then find the location and nature of the image.

Image is formed at a distance of $8 \mathrm{cm}$ from a convex mirror. If focal length of mirror is $16 \mathrm{cm}$ then find the distance of object.

Focal length of a concave mirror is $30 \mathrm{cm}$. If object is at a distance of $40 \mathrm{cm}$ then find the image distance. Find the magnification as well.

Explain Cartesian sign convention for spherical mirrors.

Write magnification formula.

Write the mirror formula.

The focal length of a mirror is $+60 \mathrm{cm}$. Which kind of mirror is it?

Differentiate between virtual and real images.

Find the focal length of a convex spherical mirror which produces an image $\frac{1}{6}$th the size of an object located $0.12 \mathrm{m}$ from the mirror?

An object is placed in front of a convex mirror at a distance of $20 \mathrm{cm}$.  An image is formed at a distance $10 \mathrm{cm}$ behind the mirror. Find the focal length of the convex mirror.

Distinguish between real and virtual images.