Question

A lens of glass is immersed in water. What will be its effect on the power of the lens?

Answer 1

Hint: In order to answer this question, we will discuss the effect on the power of the lens when a lens of glass is immersed in water as the refractive index of the material of the lens is greater than that of water. And then we will discuss the power of the lens.

Complete answer:
When a lens is submerged in water, the focal length increases, and as focal length is inversely related to angular magnification, the power of the lens diminishes or decreases.If the image formed by a lens for all positions of the object placed in front of it is always virtual, erect and diminished, in this situation, we can say that the lens of glass is immersed in water.

In Ray Optics, a lens's power is its ability to bend light. The ability of a lens to refract light that travels through it is proportional to its power. The converging ability of a convex lens is defined by its power, while the diverging ability of a concave lens is described by its diverging ability.

The converging ability of a convex lens is defined by its power, while the diverging ability of a concave lens is described by its diverging ability. The diopter $(D)$ is a unit of measurement for lens power. The reciprocal of the focal length in metres is known as the power. The focal length in metres is denoted by the letter $'F'$ .

Note: That depends on whatever lens curve you're talking about and what kind of lens you're using. The focal length may increase in certain circumstances and decrease in others. When the convex curve of a plano-convex (plus) lens diminishes, the power and focal length both increase.