Describes the new terms used in the case of lens.
Answers
Answer:
Related Terms
Pole. The centre of the spherical refracting surface of the lens is called the pole. ...
Optical Centre. The point on the principal axis at the centre of the lens is called Optical centre.
Centre of Curvature. ...
Principal axis. ...
Aperture. ...
Focus. ...
Focal length. ...
Power.
Related Terms
Pole
The centre of the spherical refracting surface of the lens is called the pole. The point where the principal axis meets the surface of the lens.
Optical Centre
The point on the principal axis at the centre of the lens is called Optical centre.
Centre of Curvature
A lens has two spherical surfaces, these two spherical surfaces form a part of a sphere. The centre of these spheres is known as the centre of curvature.
Principal axis
The principal axis is an imaginary line passing through two centres of curvature and the pole.
Aperture
The area of the lens suitable for refraction is called Aperture. The aperture of the lens is the effective diameter of its light-transmitting area.
Focus
Focus is the point onto which collimated light parallel to the axis is focused.
Focal length
The focal length is the distance between the optical centre and the focal point or focus of the lens
Power
The power of the lens is the reciprocal of its focal length. The S.I unit of power is Dioptre.