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The eye lens of human eye is a double co...

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

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The lens in human eye is a ...........

Lens of power +2.0 D is a convex lens.

Lens of power +2.0D is a convex lens

(i) If f = + 0.5 m , what is the power of the lens ? (ii) The radii of curvature of the faces of a double convex lens are 9 cm and 15 cm . Its focal length is 12 cm . What is the refractive index of glass ?

(i) If f = 0.5 m for a glass lens, what is the power of the lens? (ii) The radii of curvature of the faces of a double convex lens are 10 cm and 15 cm. Its focal length is 12 cm. What is the refractive index of glass? (iii) A convex lens has 20 cm focal length in air. What is focal length in water? (Refractive index of air-water = 1.33, refractive index for air-glass = 1.5.)

(i) If f =- 0.2 m for a glass lens, what is the power ofthe lens? (ii) The radii ofcurvature ofthe faces of a double convex lens are 15 cm and 12 cm. Its focal length is 15 cm. What is the refractive index of glass ? (iii) Refractive index and radii of curvature oftwo equal plana-convex lens are 1.5 and 20 cm respectively. They are placed in a vessel such that their convex surfaces are in contact at centre and oil ofrefractive index 1.7 is filled in them, then what will be the focal length of combination ?

A star which can be seen with naked eye fro Earth has intensity 1.6xx10^(-9)Wm^(-2) on Earth.If the corresponding wavelength is 560 nm,and the radius of the lens of human eye is 2.5xx10^(-3) m,the number of photons entering in our eye in 1s is…….

The distance between the objective lens and the eye lens of an astronomical telescope when adjusted for parallel light is 100 cm. The measured value of the magnification is 19. The focal lengths of the lenses are :

Cone-shaped retinal cells respond to the brightness or intensity of light. Agree or Disagree?

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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