(a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5m. List two possible reasons due to which this defect of vision may have arisen. With the help of a ray diagram, explain. (i) Why the student is unable to see distinctly the objects placed beyond 5 m from his eyes. (ii) Which type of corrective lens is used to restore proper vision and how this defect is corrected by the use of this lens? (b) 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.

(a) A student suffering from myopia is not able to see distinctly the

1.	(a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5m. List two possible reasons due to which this defect of vision may have arisen. With the help of a ray diagram, explain. (i) Why the student is unable to see distinctly the objects placed beyond 5 m from his eyes. (ii) Which type of corrective lens is used to restore proper vision and how this defect is corrected by the use of this lens? (b) 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.
Answer» (a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5m. List two possible reasons due to which this defect of vision may have arisen. With the help of a ray diagram, explain. (i) Why the student is unable to see distinctly the objects placed beyond 5 m from his eyes. (ii) Which type of corrective lens is used to restore proper vision and how this defect is corrected by the use of this lens? (b) 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.