Question

explain the terms
(i) pole (ii) center of curvature
(iii) Focus (iv) magnification
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Answer 1

Answer

Pole.

A pole is a long thin piece of wood or metal used specially for supporting things........ The earth's pole was the two opposite thing.

Centre of curvature

The centre of a circle which passes throw a curve at a given point and has the same tangent and the curvature of the point .

Focus

The centre of interest or activity .

the state or quality of having or producing clear visual diffusion...

Magnification

The action of magnifying something or the process of being magnified .....

the degree at which something is or can be magnified .

Answer 2

Answer:

1. pole

2. center of curvature

3. focus

4. magnification

Explanation:

1. he pole is the geometrical center i.e, the mid-point of any spherical mirror is known as the pole

2. the center of curvature of a curve is found at a point that is at a distance from the curve equal to the radius of curvature lying on the normal vector.

3.  a focus is “a point at which rays of light, heat, or other radiation meet after being refracted or reflected.”

4. Magnification is the increase (or decrease) in size of an image produced by an optical system compared to the true size.

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