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The far point of a myopic eye is 100 cm....

The far point of a myopic eye is 100 cm. What is the focal length of the lens required to see very distant (normal far point) objects clearly?

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As the focal length of concave lens used for correcting the myopic eye is equal to distance of far point of the myopic eye, the focal length of correcting lens required is f=-x = - 100 cm =- 1 m.
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KUMAR PRAKASHAN-THE HUMAN EYE AND THE COLOURFUL WORLD-OBJECTIVE QUESTIONS AND ANSWERS (Answer the following questions in very short as directed (Miscellaneous) )
  1. Match the column properly:

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  2. Match the following column:

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  3. The far point of a myopic eye is 100 cm. What is the focal length of t...

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  4. The near point of a hypermetropic eye is 75 cm. What is the focal leng...

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  5. The eye lens of human eye is a double convex lens. Agree or Disagree?

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  6. Cone-shaped retinal cells respond to the brightness or intensity of li...

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  7. Which property of vision is used in cinematography ?

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  8. What is aqueous humour ?

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  9. What is the maximum power of accommodation of a normal eye ?

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  10. What is meant by scattering of light?

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  11. What is the basic cause of atmospheric refraction ?

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  12. In the above figure a narrow beam of white light is shown to pass thro...

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  13. In the above figure, which angles are correctly marked ?

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  14. In the above figure (ray diagram), state the angle of incidence and th...

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  15. In the above figure (ray diagram), state angle of incidence, angle of ...

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  16. What is the principle of the working of the human eye?

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  17. On which factor does the colour of the scattered white light depend ?

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  18. Give the scientific names of the following parts of the eye : (a) Ca...

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  19. A near-sighted person has a near point 25 cm and a far point 50 cm. Ca...

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  20. The near point of a far-sighted person is 50 cm. Can the person see ...

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