Draw a convex lens. Mark its Focal Points, Optical centre, Aperture Size, Principal Axis, Oblique
Rays and Paraxial Rays.
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Convex lens:
- Focal point is a point on the principal axis through which paraxial light rays pass after getting refracted from the lens.
- Optical centre is a point in the lens through which light rays pass undeviated.
- Principal axis is an imaginary line passing through the focus and centre of curvature of the lens which we consider to be our reference line.
- Oblique rays are those light rays which are not parallel to the principal axis.
- Paraxial light rays are those light rays which are parallel and close to the principal axis.
- Aperture of a convex lens is the dimension of the lens exposed to the light rays.
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