What are the precautions in doing newtons ring experiment?

Answer 1

So if you want Newton's rings to form all you have to do is make sure monochromatic light incidents on glass placed at a 45 degree angle and from there it should go to the plano-convex lens. What happens here is that the ray undergoes division of amplitude. So now two coherent rays emerge out of the plano convex lens. Since these two are coherent rays they interfere each other and form constructive and destructive interference. All the loci comes together and form bright and dark rings

Answer 2

1. Click on the "light on" button.
2. Select the lens of desirable radius.
3. Adjust the microscope position to view the Newton rings.
4. Focus the microscope to view the rings clearly.
5. Fix the cross-wire on 20th ring either from right or left of the centre dark ring and take the readings .
6. Move the crosswire and take the reading of 18th,16th...........2nd ring.
7. You have to take the reading of rings on either side of the centre dark ring.
8. Enter the readings in the tabular column.
9. Calculate the wavelength of the source by using the given formula.

Answer 3

They are used to indicate the agreement between the contours of 2 surfaces. One master surface is generated in a transparent material.

When placed against the replica, surface deviations in distance between the 2 surfaces of 1/4th wavelength of the light used to illuminate the specimen will alternate between light and dark rings.

Answer 4

The experiment has two rods on one is a ball and the other a ring. To start with the ball fits through the ring. Then the ball is heated and it no longer fits the is because the particles have been given more energy by the heat and move around more.

Answer 5

SOURCESOF ERRORandPRECAUTION:

(1) Glass plates and lens should be cleaned thoroughly.

(2) The plano‐convex lens should be of large radius of curvature.

(3) The sources of light used should be an extended one.

(4) The range of the microscope should be properly adjusted before measuring the diameters.

(5) Crosswire should be focused on a dark ring tangentially.

(6) The centre of the ring system should be a dark spot.

(7) The microscope is always moved in the same direction to avoid back lash error.

(8) Radius of curvature should be measured accurately.

Answer 6

rings are formed due to the interference between the light waves reflected from the top and bottom surfaces of the air film formed between the lens and glass sheet

Answer 7

Newton's Ring experiment is a phenomenon in which the reflection of light between two surfaces is used to create an interference pattern. It is named after the Scientist, Sir Isaac newton.

Answer 8

Newton' s ring experiment demonstrates interference with a circular object. A central dark fringe can be located between the glass plate and a lens.