A student sitting at the back of the classroom cannot read clearly the letters written on the blackward. What advice will a doctor give to her ? Draw ray diagram for the correction of this defect.

A student sitting in the last row of the class-room is not able to read clearly the writing on the blackboard. (a) Name the type of defect he is suffering from. (b) How can this defect by corrected ?

A 14 year old student is not able to see clearly the questions written of the black board placed at a distance of 5 m from him. Draw the diagram to show this defect?

A student sitting at the backbench 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.

A student sitting on the last bench in the class cannot read be writing on the blackboard clearly but he can read the book lying on his desk clearly. Which of the following statement is correct about the student ?

A 14 year old student is not able to see clearly the questions written of the black board placed at a distance of 5 m from him. Draw the diagram to show how this defect can be corrected.

A student find the writing on the blackboard as blurred and unclear when sitting on the last desk in the classroom. He, however, sees it clearly when sitting on the front desk at an approximate distance of 2m from the blackboard. Draw ray diagrams to illustrate the formation of image of the blackboard writing by his eye-lens when he is seated at the (i) last desk (ii) front desk. Name of the kind of lens that would help him to see clearly even when he is seated at the last desk. Draw a ray diagram to illustrate how this lens helps from to see clearly.