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Two boys one 52 inches tall and the othe...

Two boys one 52 inches tall and the other 55 inches tall, are standing at distances 4.0 m and 5.0 m respectivley from an eye. Which boy will taller?

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The angle subtended by the first boy on the eye is
`alpha_1=(52 inch)/(4.0 m)=13 inch/m`
and the angle subtended by the second boy is
`alpha_2=(55inch)/(5.0m)=11 inch/m `
As `alpha_1gtalpha_2` the first by wil look taller to the eye
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HC VERMA-OPTICAL INSTRUMENTS-Exercises
  1. Two boys one 52 inches tall and the other 55 inches tall, are standing...

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  2. An object is to be seen through a simple microscope of focal length 12...

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  3. A simple microscope has a magnifying power of 3.0 when the image is fo...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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