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Q. What is the Newton meter?
Answer:-
A unit of energy is as well known as a Joule. When a force of 1 Newton is used on an object for a distance of 1 meter then 1 Joule of energy is used. It is the result of a vector computation involving the meter (a unit of length in the SI system) and the Newton (the unit of force in the SI system).
A unit of torque (Turning force) When a force of 1 Newton is used at a distance of 1 meter from the pivot at right angle to the radius then a torque of 1 Newton Meter is present. It is the metric equal of lb ft It is the name given to a device that measures force. It is a meter that measures the Newtons.
Q. Explain how Newton's ring can be obtained in the laboratory. Why Newton's rings are circular in shape? How the Newton's rings are used to find refractive index of liquid?
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