When a lens immersed in a liquid it become disappear Why?

A lens which is immersed in a transparent liquid becomes invisible when, refractive index of liquid is equal to or greater than the refractive index of glass. A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism.

What happens when a glass lens is immersed in water?

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.

What happens when a convex lens is immersed in a liquid?

When any lens or glass slab is immersed in a liquid whose refractive index is equal to that of lens, refractive index of lens will be equal to 1 relative to that liquid. The focal length of the lens in this case, will tend to infinity.

Under which condition immersion of lens in any transparent liquid would not be seen by us?

Light – Reflection and Refraction. A lens immersed in transparent liquid is not visible. This happens when the refractive index of the liquid is same as that of the lens material. Under such conditions, no light is reflected by the lens and hence it is not visible.

When the upper half of the lens is covered by an opaque screen?

When the upper half of the lens is covered by an opaque screen. Complete image will be formed of decreased intensity.

When a concave lens is immersed in water?

In case of spherical mirrors (both concave and convex), there will be no change in the focal length of the mirrors when immersed in water. This is because the focal length of mirrors does not depend on the external medium in which it is held.

When a spherical convex lens is made up of glass is immersed in water?

focal length depends upon refractive index of lens with respect to medium. hence, after immersing of lens in water focal length of lens increases.

What happens when concave lens is dipped in water?

when concave lens immersed in water the focal length of lens increases because focal length of lens is directly proportional to refractive index of medium and when immersed in water the medium become more dancer so its focal length increases.

When a glass lens with N 1.47 is immersed in a trough of liquid it looks to be disappeared the liquid in the trough could be?

The refractive index of the liquid must be equal to 1.47 in order to make the lens disappear. This meansn1=n2 .

Why some pictures disappear when the picture put into the water?

It’s because of the total internal reflection of light. When the light passes from the aqueous medium to the gaseous one, it changes direction slightly, because the two media do not have the same density. This is called light refraction.

Under what condition is glass lens?

When refractive index of the material of lens is equal to the refractive index of the liquid, there would be no bending of light when it travels from the lens to the liquid and both will start behaving as if they are same entities.