Multiple choice

A man wearing glasses of focal length +1 m cannot see clearly beyond 1 m

  1. if he is longsighted

  2. if he is shortsighted

  3. if his vision is normal

  4. in each of these cases
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Beyond 1 m, every image will be behind the lens. This means that conveying rays will fall on our eyes. Human eye can only see diverging rays as conveying rays mean an object inside the eye, whose image can never be created inside the eye.

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