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Eye is a natural optical device by which...

Eye is a natural optical device by which human could see objects around him. It forms an inverted, real image on a light sensitive surface called retina. It works on the phenomenon of refraction of light through a natural convex lens.
However, Sanjana was unable to see clearly the words written on the black board placed at a distance of approximately 3.5m from her. Her mother discussed the same with the doctor. Doctor explained her about this defect of vision and its correction.
______ power of lens shows that it is concave lens.

A

Negative

B

Zero

C

Positive

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
A
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Eye is a natural optical device by which human could see objects around him. It forms an inverted, real image on a light sensitive surface called retina. It works on the phenomenon of refraction of light through a natural convex lens. However, Sanjana was unable to see clearly the words written on the black board placed at a distance of approximately 3.5m from her. Her mother discussed the same with the doctor. Doctor explained her about this defect of vision and its correction. The human eye forms the image of the object at its ______

Eye is a natural optical device by which human could see objects around him. It forms an inverted, real image on a light sensitive surface called retina. It works on the phenomenon of refraction of light through a natural convex lens. However, Sanjana was unable to see clearly the words written on the black board placed at a distance of approximately 3.5m from her. Her mother discussed the same with the doctor. Doctor explained her about this defect of vision and its correction. What kind of defect Sanjana is suffering from?

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Eye is a natural optical device by which human could see objects around him. It forms an inverted, real image on a light sensitive surface called retina. It works on the phenomenon of refraction of light through a natural convex lens. However, Sanjana was unable to see clearly the words written on the black board placed at a distance of approximately 3.5m from her. Her mother discussed the same with the doctor. Doctor explained her about this defect of vision and its correction. Identify the possible cause of the defect from the following:

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