A child while playing with his father's spectacles burnt a hole in a piece of them tissue paper by focusing the image of the sun on at .Name the defect ,list 2 causes of this defect and draw a ray diagram to show how this defect maybe corrected using a suitable lens
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he is suffering from hypermetropia
causes of hypermetropia:-
eyeball is too small
focal length is too long
causes of hypermetropia:-
eyeball is too small
focal length is too long
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The defect is hypermetropia.
The causes are : 1) The focal length of the eye lens is too long.
2) The eye ball has become too small.
The causes are : 1) The focal length of the eye lens is too long.
2) The eye ball has become too small.
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