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Define the following terms in the context of spherical mirrors:i. Centre of curvature ii. Principal axisiii. optical centreiv. aperturev.focus |
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Answer» Explanation: 1.Centre of curvature of a spherical mirror is defined as the centre of the sphere of which the spherical mirror is a PART. 2.A LINE joining the pole P to centre of curvature of the mirror, produced on both SIDES is called principal axis of mirror. 3.The Optical centre of the lens is defined as the point which lies on the principal axis through the rays of light passes without any deflection or it can be defined as the central point of the lens through which a ray of light passes without suffering any deviation. 4. The length of the straight line joining the points of extremities of a spherical mirror is called the aperture. 5.When rays from infinity come in parallel to the optical axis of a spherical mirror, they are bent so that they either converge and INTERSECT in at a point, or they seem to diverge from a point. The point of convergence or divergence is called the focus. |
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