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sign convention for spherical lenses

0000020317 00000 n (iii) The distances measured against the direction of incident light are taken as negative. 1064 0 obj <> endobj If, in this case, the numerical value of the focal length of the corrective lens is 5 m, find the power of the lens as per the new Cartesian sign convention. 0000042105 00000 n 0000002746 00000 n For converging lenses, the focal length is always positive, while diverging lenses always have negative focal lengths. 0000016566 00000 n 0000006674 00000 n 0000060928 00000 n 0000003204 00000 n The distance from the lens to the focal point is called the focal length. 0000002930 00000 n %%EOF What sign (+ve or -ve) has been given to the following on the basis of Cartesian Sign Convention? Describe the New Cartesian Sign Convention used in optics. ll A measurements are taken from the optical centre of the lens which lies on the origin of x-y axis. 0000009271 00000 n 0000060906 00000 n 0000003920 00000 n List the new Cartesian sign convention for reflection of light by spherical mirrors. Two lenses A and B have focal lengths + 20 cm and - 10 cm respectively. 0 Z�g�z�̕ejr�Yx�v�( 0000060883 00000 n (ii) The distances measured in the same direction as that of incident light are taken as positive. 0000008055 00000 n 0000002102 00000 n 0000008634 00000 n 0000000016 00000 n The distances measured against the direction of incident light are taken as negative. 0000004708 00000 n 0000060976 00000 n 1101 0 obj<>stream 0000008017 00000 n 0000003425 00000 n Thin lens rules and sign conventions 0000005685 00000 n Sign conventions 4 • Light travels from left to right • A radius of curvature is positive if the surface is convex towards the left • Longitudinal distances are positive if pointing to the right • Lateral distances are positive if pointing up • Ray angles are positive if the ray direction is obtained by rotating the 0000002968 00000 n (ii) The distances measured in the same direction as that of incident light are taken as positive. List the sign conventions that are followed in case of refraction of light through spherical lenses. However, these conventions are arbitrary, and physicists could just as easily have made the signs opposite. (iv) The distances measured upward and perpendicular to the principal axis are taken as positive. All the distances are measured from the optical center of the lens. According to the New Cartesian Sign Convention for mirrors what sign has been given to the focal length of: a concave mirror? 1064 38 xref %PDF-1.4 %���� 0000006371 00000 n New Cartesian Sign Convention for spherical lenses: (i) All the distances are measured from the optical centre of the lens. trailer The distances measured in the same direction as that of incident light are taken as positive. In numericals, we need to calculate some things likeObject distanceImage distanceObject heightImage heightFocal lengthTo calculate them correctly, we need to find whether it is positive or negativeThe sign convention mentioned below helps us in itWe can see the sign convention in … 0000006100 00000 n 0000021117 00000 n We can see the sign convention in both Lens Some points to note Focal length of Convex Lens is positive Focal length of Concave Lens is negative Since object is always in front of the lens, object distance is always negative If a real image is formed, image is formed on right side, so image distance is positive Two lenses A and B have power of + 2 D and - 4 D respectively. 0000060952 00000 n x�b```b``�d�```�gf@ a6v�&�Gx���>rI�k��ݠ~��ᡓI�Ϸ[�&?��礂�N���嫳K.�`�b�ш��5۩�E��aNa9�LQ�i�lZ�^ (v) The distances measured downward and perpendicular to the principal axis are taken as negative. 0000060861 00000 n 0000055937 00000 n 0000009401 00000 n State and explain the New Cartesian Sign Convention for spherical lenses. 0000008277 00000 n (iv) The distances measured upward and perpendicular to the principal axis are taken as positive. (iii) The distances measured against the direction of incident light are taken as negative. 0000002404 00000 n 0000009315 00000 n 0000002278 00000 n New Cartesian Sign Convention for spherical lenses: (i) All the distances are measured from the optical centre of the lens. Sign Convention for Spherical Lenses. 0000008336 00000 n startxref 0000006859 00000 n 0000019430 00000 n 0000001083 00000 n 0000005874 00000 n Sign Convention for Spherical Lenses : For lenses, we follow sign conventions, similar to the one used forspherical mirrors. 1R�IZ�+m��2�������†N猀�|r�\N�jE�lV�5��C��љq~P��d�.1��\9/oLIx��c�V����W��t(i�px��%�b���!i�ξ[F���F����. According to the convention, the focal length of a convex lens is positive and that ofa concave lens is negative. <<98BDC5D78BCD8447B85703CDCC1ED24A>]>>

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