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What is the basic cause of atmospheric r...

What is the basic cause of atmospheric refraction ?

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The basic cause of atmospheric refraction is variation in the refractive index (i.e., optical density) of different layers of the earth.s atmosphere with altitude.
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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. The far point of a myopic eye is 100 cm. What is the focal length of t...

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

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

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

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  5. Which property of vision is used in cinematography ?

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  6. What is aqueous humour ?

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

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  8. What is meant by scattering of light?

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  9. What is the basic cause of atmospheric refraction ?

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

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

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

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

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

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

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

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

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

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  19. How much is our horizontal field of view (a) with one eye open (b)...

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  20. Which of the following have a wider field of view ? (a) Animals havin...

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