Does focal length of lens depend on the colour of light used? Does focal length of a mirror depend on the colour?

Focal length of plane mirror is ......

Focal length of thin lens ......

What is the focal length of plain goggles ?

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is ..........

The focal length of the eye lens is changed due to the action of the……….

Will the focal length of a lens for red light be more, sam or less than that for blue light

If the focal length of a lens for red and violet light rays respectively are f_R and f_V then which of the following is true relationship ?

On which factor does the colour of the scattered white light depend ?

Convex lens of focal length A and concave lens of focal length B are kept in contact, then the effective focal length of system is .......

The change in focal length of an eye lens is caused by the action of the …