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When a plano-convex lens with its convex surface is placed on a plane glass sheet, an air film of gradually increasing thickness outward is formed between the lens and the sheet. The thickness of film at the point of contact is zero. If monochromatic light is allowed to fall normally on the lens, and the film is viewed in reflected light, alternate bright and dark concentric rings are seen around the point of contact. These rings were first discovered by Newton, that's why they are called NEWTON'S RINGS .
experimental setup
Pattern of Newton's Ring
WHY NEWTON'S RINGS ARE FORMED
Newton's rings are formed due to interference between the light waves reflected from the top and bottom surfaces of the air film formed between the lens and glass sheet. EXPLANATIONThe phenomenon of the formation of theNewton's rings can be explained on the basis of wave theory of light.
An air film of varying thickness is formed between the lens and the glass sheet.
When a light ray is incident on the upper surface of the lens, it is reflected as well as refracted.
When the refracted ray strikes the glass sheet, it undergo a phase change of 180O on reflection.
Interference occurs between the two waves which interfere constructively if path difference between them is (m+1/2)land destructively if path difference between them is mlproducing alternate bright and dark rings.
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∙ 12y ago
Wiki User
∙ 14y agoNewton's rings is an interference pattern caused by the reflection of light between two surfaces - a spherical surface and an adjacent flat surface. When viewed with monochromatic (single color) light it appears as a series of concentric, alternating light and dark rings centered at the point of contact between the two surfaces.
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∙ 13y agonewton's rings are formed by the interference of light
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∙ 13y agoThe newton's rings can be observed using a travelling microscope. These rings are formed in the interface between the glass plate and the convex lens.
Wiki User
∙ 13y agothe rings are formed in the air film in the space between the lens and the glass plate.
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∙ 12y agointerference
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What units does the equipment use to measure the force of weight?
The pound.force, or in the SI system the Newton (1 pound.force = 4.48 Newtons)
What is Uranus's gravitational force?
8.8 newtons per kg i hope this is right cause it doesnt seem like it sorry
What is an astronaut's mass if she weighs 104 newtons?
43.10 newtons because weight affect newtons
What is 160 pounds in newtons?
About 712 newtons per 160lbs.
What is 32 pounds in newtons?
32 pounds force = 142.343092 newtons
What is Radius of curvature in newtons rings?
The answer is 127.35cm
Which light is used in newtons rings?
sodium light
What happens when a concave lens is placed in Newtons' rings experiment?
rings start collapsing to the centre
Why all rings in newtons rings are not equispaced?
outer rings are spaced more closely than the inner ones.Because slope of lens increases outward,separation of rings get smaller for the outer rings.
Why are rings circular in newtons rings?
Since a plano-convex lens is being used in Newton's Rings .. that's why=the fringes are seen circular from above, on the glass plate.=
Explain any one engineering application of interference due to thin films?
newtons rings
What happened in newtons ring experiment if the glass plate is replaced by mirror?
if we use glass plate then ring's will be clear
What would cause rings to align?
There are no condition that can cause rings to align that was a mistake by the installer. Once the rings are set on the piston they are permanently in place.
What is the angular fringe width in newtons rings?
fringes are formed in air film inspacebetween lens and glass plate
Can a force of 700 newtons cause much damage?
yes
Will bad rings cause blue smoke from exhaust?
Stuck or broken oil rings can cause blue smoke.
Can gold rings cause arthritis?
No
