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Explain how refractive index of liquid is determined by using Newtons ring experiment?
Wiki User
∙ 10y ago
After experimental arrangement, the glass plate is inclined at an angle 45° to the horizontal. One or two drops og the given liquid is placed between the glass plate and lens. This glass plate reflects light from the source vertically downloads and falls normally on the convex lens. Newton's rings are seen using a long focus microscope, focussed on the air fil. The cross-wire of the microscope is made tangential to the 20thring on the left side of the centre. The readings of the main scale and vernier scale of the microscope are noted. The cross wire is adjusted to be tangential to the 18th, 16th, 14th, etc on the left and 2nd, 4th, 6th, etc on the right and readings are taken each time. From this the diameter of the ring is found out which is the difference between the readings on the left and right sides. The square of the diameter and hence Dn2 and D2n+m are found out.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoi dont think
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