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…is the unit of power of the lens...

…is the unit of power of the lens

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The unit of power of lens is…… .

A lens is a focal length - 0.5 m. What is the nature and power of the lens?

The far point of a myopic person in 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

A convex lens is made of glass of refractive index 1.5.If radius of curvature of the each of its twosurfaces is 20 cm,find the ratio of the power of the lens,when placed in air to its power ,when immersed inside a liquid of refractive index 1.25.

Define power of a lens

MBD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
  1. Parallel rays incident on a mirror,after reflection converge at a poin...

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  2. The unit of power of lens is…… .

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  3. Power of a lens is -5d, its focal length is:

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  4. Which of the following lenses would you prefer to use while reading sm...

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  5. Shaving mirrors are-

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  6. Which of the following is the property of light?

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  7. Twinkling of stars is due to atmospheric:

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  8. Defect of vision that cannot be corrected by spectacles is:

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  9. Which one of the following material cannot be used to make a lens?

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  10. Where should object be placed in front of a convex lens to get real im...

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  11. A spherical mirror and a thin spherical lens have each a focal length ...

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  12. No matter how far you stand from a mirror,your image appear erect.The ...

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  13. The refractive index of diamond is:

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  14. A ray of light travelling in a glass merges into air, it will bend:

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  15. A concave mirror forms image inverted and equal in size, when object i...

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  16. A…………. Mirror is used to see the rear view in cars.

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  17. The ratio of sine of angle of incidence to the sine of angle of refrac...

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  18. When a beam of light passes form optically rarer medium to optically d...

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  19. …is the unit of power of the lens

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  20. A virtual and enlarged image is formed by a …….mirror.

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