Question

explain about spherical lenses in detail??​

Answer 1

Answer:

A lens is a part of a transparent thick glass which is bounded by two spherical surfaces. It is an optical device through which the rays of light converge or diverge before transmitting. Thus spherical lenses are of two major kinds called “Convex or Convergent” lenses and “Concave or Divergent” lenses.

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Answer 2

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spherical lenses:-

Spherical lenses are the lenses formed by binding two spherical transparent surfaces together. Spherical lenses formed by binding two spherical surfaces bulging outward are known as convex lenses while the spherical lenses formed by binding two spherical surfaces such that they are curved inward are known as concave lenses.

Important terms related to spherical lenses:-

• Pole (P): The midpoint or the symmetric centre of a spherical lens is known as its Optical Centre. It is also called as the pole.

• Principal Axis: The line passing through the optical centre and the centre of curvature.

• Paraxial Ray: A ray close to principal axis and also parallel to it.

• Centre of curvature (C): The centres of the spheres that the spherical lens was a part of. A spherical lens has two centres of curvatures.

• Focus (F): It is the point on the axis of a lens to which parallel rays of light converge or from which they appear to diverge after refraction.

• Focal length: Distance between optical centre and focus.

• Concave lens: Diverging lens

• Convex lens: Converging lens