# What happens if we replace the plano convex lens with glass in Newton rings experiment?

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They are formed as a result of Interference between light wave reflected from upper and lower surfaces of the air films developed between the convex surface of a plano-convex lens and the plane glass plate. … If we do this, then the interference will take place but the shape of the rings will be irregular.

## Why only plano convex lens is used in Newton’s ring?

There is no loss of energy in interference phenomenon, only redistribution of energy takes place. … The rings are formed as a result of interference between light waves reflected from the upper and lower surfaces of the air film developed between the convex surface of plano convex lens and plane glass plate.

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## What will happen when the glass plate below the plano convex lens is silvered?

20. What will happen if the glass plate is silvered on its front surface? Ans. The transmitted system of fringes will also be reflected and due to the superposition of the reflected and transmitted (which is also reflected now) systems the uniform illumination will result.

## Which lens is preferred for Newton’s rings experiment?

To study the formation of Newton’s rings in the air-film in between a plano-convex lens and a glass plate using nearly monochromatic light from a sodium-source and hence to determine the radius of curvature of the plano-convex lens. 1. Level the traveling microscope with its axis vertical.

## What if we use concave lens in Newton ring?

The thickness of Newton’s rings depends upon the gap between lens and mirror. For convex lens, gap is least around center so you see thick rings around center. Thus for concave lens, you will see thick rings around edges and very thin rings around center.

## What will happen if we use a plano-convex lens of small radius of curvature?

Q. What will happen if we use a lens of small radius of curvature? A. Then the rings will be of smaller diameter and there is chance of error while taking the readings.

## What type of plano-convex lens is preferred for Newton’s rings formation?

5: Newton’s rings seen in two plano-convex lenses with their flat surfaces in contact. One surface is slightly convex, creating the rings. In white light, the rings are rainbow-colored, because the different wavelengths of each color interfere at different locations.

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## What will happen if plane glass plate below the plano-convex lens is replaced by another plano-convex lens?

They are formed as a result of Interference between light wave reflected from upper and lower surfaces of the air films developed between the convex surface of a plano-convex lens and the plane glass plate. … If we do this, then the interference will take place but the shape of the rings will be irregular.

## What is plano-convex lens?

Plano-convex lenses are positive focal length elements that have one spherical surface and one flat surface. These lenses are designed for infinite conjugate (parallel light) use or simple imaging in non-critical applications. These optic lenses are ideal for all-purpose focusing elements.

## What will happen if we replace the lens with plane glass?

Explanation: Ans: If glass plate is replaced by a plane mirror, the transmitted rays before will be reflected now. Due to the superposition between reflected and transmitted (now reflected) rays, uniform illumination will result.

## What will happen if in the Newton’s rings experiment i the glass plate be replaced by a plane mirror II air in the inter space is replaced by a transparent liquid?

If we replace the glass plate with a mirror then, we will not get any interference fringe because the intensity of light reflected from the mirror will be so great that it won’t be visible and we will get uniform illumination.

## When a liquid is introduced between plano-convex lens and glass plate in Newton’s ring experiment then diameter of rings becomes?

From these equations, it is evident that The diameter of Newton’s rings is inversely proportional to the refractive index. Therefore when a drop of water is introduced between the glass plate and plano-convex lens then the refractive index of the medium between them increases.

## Why plano-convex lens of large radius of curvature is used in Newton’s ring experiment?

surface of large radius of curvature. This is necessary because the rings observer have then a large diameter and hence the error in the measurement of their diameters will be minimum. surface of the lens and the plate. For this reason, the surfaces are to be cleaned before the commencement of the experiment.

## What will happen if few drops of liquid are introduced between the lens and glass?

Since the gap between the glasses increases radially from the center, the interference fringes form concentric rings. The thickness of the rings decreases as their diameter decreases. … Thus, the diameter of the rings contract when a drop of water is introduced between the lens and the glass plate.