Long Question with answer:
Q1. A child while playing with his father's spectacles burnt a hole in a piece of paper by focusing a small image of sun on it.
(i) What defect of vision his father is suffering from?
(ii) Write two cause for this defect?
(iii) Draw a ray diagram to show image formation by the defective eye?
(iv) Draw a ray diagram showing corrected eye using proper lens.
Ans:
(i) Hypermetropia
(ii) (a) the focal length of the eye lens is too long.
(b) the eyeball has become too small.
(iii) Ray diagram to show image formation by the defective eye.
(iii) This defect can be corrolated by convex lens.
