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What is a lens formula ? State it....

What is a lens formula ? State it.

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The relationship between the object distance (u), image distance (v) and focal length (f) of a lens is called the lens formula .
It is `(1)/v-1/u=1/f`
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The lens formula is

Thin Lens Formula

What is the formula for power of a lens ?

……………. Represents the lens formula .

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NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-Answer the following questions :
  1. Draw a ray diagram to show image formation by a concave lens.

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  2. State the Cartesian sign convention for refraction of light (image for...

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  3. What is a lens formula ? State it.

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  4. What is meant by the magnification produced by a lens State the formul...

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  5. Express the magnification produced by a lens in terms of the local len...

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  6. An object is kept in front of a lens of focal length +10 cm. Describe ...

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  7. An object is kept in front of a lens of focal length +10 cm. Describe ...

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  8. Annu and Anand have concave and convex lenses respectively. They took ...

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  9. To obtain a magnified real image of a small film strip, which type of...

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  10. When an object of height 2 cm is placed in front of a convex lens, the...

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  11. You are given a lens which gives a virtual , erect and enlarged image....

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  12. When an object of height 3 cm is placed in front of a concave lens, th...

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  13. State used of a convex lens.

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  14. State used of a convex lens.

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  15. An object is kept in front of a lens of focal length-20 cm . Describe...

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  16. An object is placed in front of a convex lens of focal length 20 cm . ...

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  17. What is the power of a lens ?

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  18. What is the unit of power of a lens ? Define it .

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  19. What is the sign of the power of (i) a convex lens (ii) a concave lens...

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  20. If there is an increase or decrease in the focal length of a lens, wha...

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