Question

student sitting at the back bench in a class has difficulty in reading. what could be his defect of vision? draw ray diagram of illustrate the image formation of the blackboard when he is seated at the (1) back seat (2) front seat. state two possible causes of this defect . explain the method of correcting this defect with the help of Ray diagram.

Answer 1

Defect of the eye: Short sightness( MYOPIA)

--> image will be formed in front of retina.

Correction: Concave lens

--> Rays are diverged to the retina by using the diverging lens.

1) at back seat the image will be formed in front of RETINA

2) at front seat the image will be formed on retina or near to it depending on the power of the student's lens