Question

A student sitting at the back bench in a class has difficulty in reading. What could be his defect of vision? Draw ray
diagrams to illustrate the image formation of the blackboard when he is seated at the
(i) back seat
(ii) front seat.
State two possible causes of this defect. Explain the method of correcting this defect with the help of a ray diagram.

Answer 1

He is suffering from myopia.it can be corrected using convex lens.

Answer 2

HI MATE........

THE STUDENT IS SUFFERING FROM MYOPIA/SHORT-SIGHTEDNESS.

FOR RAY DIAGRAM PLEASE REFER TO NCERT TEXTBOOK PAGE NO. 182.

THIS DEFECT CAN BE CORRECTED BY USING CONCAVE LENS OF SUITABLE FOCAL LENGTH

2 POSSIBLE CAUSES OF MYOPIA ARE:-

1. LENS OF THE EYE IS TOO LONG.

2. FOCAL LENGTH OF THE EYE IS TOO SMALL.

HOPE THIS WILL HELP U!!!!