# Focal Length Of Lens Depends On Surrounding Medium

Focal Length Of Lens Depends On Surrounding Medium. Focal length of a lens depends on the refractive index of the material of the lens relative to its surrounding medium. Reason f 1 = μ 1 μ 2 − μ 1 ( r 1 1 − r 2 1 )

Statement1 If a convex lens is kept in water. its from doubtnut.com

As we move away from the lens on the other. When the refractive index of surrounding media is equal to the refractive index of lens. the lens looses its characteristics. A convex lens of focal length 25 cm is placed coaxially in contact with a concave lens of focal length 20 cm.

If if the focal length of a lens th depends on refractive index of surrounding medium what happens if the refractive index of a liquid that used as surrounding medium is equal to the refractive index of a lens guess and write The focal length of an optical system is a measure of how strongly the system converges or diverges light;

Source: doubtnut.com

Answers (1) d deependra verma. Since the surrounding medium changes from air to water. the refractive index decreases and so the focal length of the lens increases.

Videos you watch may be. Both concave lens and concave mirror

A convex lens of focal length 25 cm is placed coaxially in contact with a concave lens of focal length 20 cm. In the above diagram. air could be the medium for n1. but since the refractive index of air is.

Source: coolgyan.org

To determine the focal length of a thin lens and to explore the difference between convex and concave lenses and to determine their focal lengths. Its possible that you are working from sources that define optical power and focal length differently.

Source: newsstellar.com

Both convex lens and convex mirror c: Therefore. the refractive index of the lens material affects the focal length because the refractive index tells us the amount of bending of light when it passes from one medium to another.

#### Determine The Power Of The Combination.

A) focal length of a lens depends on the surrounding medium. Now increase the height of lens till the image of stone is lost; Its possible that you are working from sources that define optical power and focal length differently.

#### Since The Surrounding Medium Changes From Air To Water. The Refractive Index Decreases And So The Focal Length Of The Lens Increases.

The focal length of a lens depends on different factors like radius of curvature of the lens and the refractive indices of the lens as well as the surrounding medium. In the above diagram. air could be the medium for n1. but since the refractive index of air is. F is the focal length which is the difference between the optical centre of the lens and the principal focus.

#### The Focal Length Of A Lens Does Not Depend On The Medium In Which It Is Submerged.

A) both. (a) and (b) are true. To determine the focal length of a thin lens and to explore the difference between convex and concave lenses and to determine their focal lengths. Focal length of a lens depends on its surrounding medium.

#### Pick The Correct Answer From The Following Two Statements.

The system will be a diverging lens as it has negative power. Both convex lens and convex mirror c: Will the system be converging or diverging in nature?

#### The Image Can Be Obtained On The Screen As The Image Formed By The Lens Is Real.

A parallel beam of light is incident on a converging lens parallel to its principal axis. Videos you watch may be. Which means focal length of lens has increased in water ;