## What is the radius of curvature of spherometer?

=1/100=0.01 mm. A spherometer basically is a precision instrument to measure very small lengths. Its name reflects the way it is used to measure the radii of curvature of spherical surfaces. It is based on the principle of screw.

## How do you find the radius of curvature?

The curvature is measured in radians/meters or radians/miles or degrees/mile. The curvature is the reciprocal of the radius of curvature of the curve at a given point. The radius of curvature formula is R=(1+(dydx)2)3/2|d2ydx2| R = ( 1 + ( d y d x ) 2 ) 3 / 2 | d 2 y d x 2 | .

What is LC in spherometer?

The Least count (LC) is the distance moved by the spherometer screw, when the screw is turned through 1 division on the circular. We are using a spherometer which has 100 divisions (N) on the disc. The least count can be calculated using the formula, The formula for the radius of curvature of a spherical surface.

What is radius of curvature in physics class 11?

Radius of curvature of a path at a point is a circle to which the curve of the path touches the circle tangentially. It tells us how much the curve is at this point. Less the radius of curvature, more pointed is the curve at the given point.

### What is radius of curvature in physics?

The radius of curvature of a spherical mirror is the radius of the circle of which the spherical mirror is a part. It can also be defined as the distance between the centre of curvature of the mirror and the pole of the mirror on the principal axis. The radius of curvature is also a measure of how curved the mirror is.

### What is the radius of curvature of the lens?

Definition: Radius of curvature of lens is the radius of the hollow sphere of glass of which the lens is a part. Each lens has two radii of curvature. From this formula we can say that focal length of lens is inversely proportional to refractive index of material of lens medium.

How many divisions are there in circular disc of a spherometer?

The pitch of a spherometer is 1 mm and there are 100 divisions on its disc. It reads 3 divisions on the circular scale above zero when it is placed on a plane glass plate. When it rests on a convex surface, it reads 2 mm and 63 divisions on a circular scale.

Which principle works on spherometer?

A spherometer works on the principle of the micrometer screw. It is used to measure either very small thickness of flat materials like glass or the radius of curvature of a spherical surface thus getting its name.

#### What is radius of curvature of mirror Class 10?

Hint:The radius of curvature of convex or concave mirror is equal to two times of the focal length of convex or concave mirror. The radius of curvature is the radius of sphere formed by the convex or concave mirror. It is also equal to the distance between the pole and centre of curvature.

How is the radius of curvature of a spherical surface measured?

It works on the principle of micrometre screw (Section 2.09) It is used to measure either very small thickness or the radius of curvature of a spherical surface that is why it is called a spherometer. Raise the central screw of the spherometer and press the spherometer gently on the practical note-book so as to get pricks of the three legs.

How are the legs of A spherometer moved?

The tips of the three legs form an equilateral triangle and lie on the radius. There is a central leg which can be moved in a perpendicular direction. Below is the experiment on how to determine radius of curvature of a given spherical surface by a spherometer. To determine radius of curvature of a given spherical surface by a spherometer.

## Why is a convex surface called A spherometer?

Spherometer, convex surface (it may be unpolished convex mirror), a big size plane glass slab or plane mirror. It works on the principle of micrometre screw (Section 2.09) It is used to measure either very small thickness or the radius of curvature of a spherical surface that is why it is called a spherometer.

## What should the reading be on A spherometer?

When the middle foot touches the surface, the instrument turns rounds on the middle foot as the centre. The spherometer is then carefully removed from the surface to take the reading from the micrometre screw. If the instrument is working fine, then the reading should be 0-0.