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A child has near point at 10 cm. What is...

A child has near point at 10 cm. What is the maximum angular magnification the child can have with a convex lens of focal length 10 cm?

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The correct Answer is:
B
The child had D=10 cm and f=10 cm. The maximum angular magnification is obtained when the imasge is formedd at near point.
`=m=1+D/f=1+10/10`
`=1+1=2`
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HC VERMA-OPTICAL INSTRUMENTS-Exercises
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  2. A simple microscope has a magnifying power of 3.0 when the image is fo...

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  3. A child has near point at 10 cm. What is the maximum angular magnifica...

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  4. A simple microscope is rated 5 X for a normal relaxed eye. What Nvill ...

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  5. Find the maximum magnifying power of a compound microscope having a 25...

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  6. The separation between the objective and the eyepiece of a compound mi...

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  7. An eye can distinguish between two points of an object if they are sep...

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  8. A compound microscope has a magnifying power of 100 when the image is ...

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  9. A compound microscope consists of an objective of focal length 1 cm an...

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  10. An optical instrument used for angular magnification has a 25 D object...

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  11. An astronomical telescope is to be designed to have a magnifying power...

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  12. The eyepiece of an astronomical telescope has a focal length of 10 cm....

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  13. A Galilean telescope is 27 cm long when focussed to form an image at i...

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  14. A farsighted person cannot see objects placed closer to 50 cm. Find th...

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  15. A nearsighted person cannot clearly see beyond 200 cm. Find the power ...

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  16. A person wears glasses of power - 2.5 D. Is the person short sighted o...

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  17. A professor reads a greeting card received on his 50th birthday with +...

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  18. A normal eye has retina 2 cm behind the eye-lens. What is the power of...

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  19. The near point and the far point of a child are at 10 cm and 100 cm. I...

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  20. A nearsighted person cannot see beyond 25 cm. Assuming that the separa...

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