define pole, principal axis, centre of curvature
Answers
Answer:
POLE: the centre of the reflecting surface of a spherical mirror is a point called the pole.CENTRE OF CURVATURE: the centre of curvatureof a spherical mirror is the centre of the hollow sphere of glass of which the mirror is a part.
Explanation:
principal axis in American English
noun. 1. Optics. a line passing through the center of the surface of a lens or spherical mirror and through the centers of curvature of all segments of the lens or mirror.
Answer: this is the pole of a plane mirror:The point where the principal axis pierces the mirror is called the pole of the mirror. Compare this with the poles of the earth, the place where the imaginary axis of rotation pierces the literal surface of the spherical earth.
this is the pole of concave mirror:Pole: It is the center of the reflecting surface of the concave mirror also called vertex of mirror, generally denoted by letter 'P
principle axis:The principal axis of a spherical mirror is a line going through the center of the mirror that is exactly perpendicular (sometimes said "normal") to the surface of the mirror. By definition, a spherical mirror is rotationally symmetrical around its principal axis.
centre of curvature:The point in the center of the sphere from which the mirror was sliced is known as the center of curvature and is denoted by the letter C in the diagram below. The point on the mirror's surface where the principal axis meets the mirror is known as the vertex and is denoted by the letter A in the diagram below.