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SS2: PHYSICS - 3RD TERM

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  1. Waves I
    3 Topics
    |
    1 Quiz
  2. Light Waves
    3 Topics
    |
    1 Quiz
  3. Reflection of Light Waves at Plane Surfaces
    4 Topics
    |
    1 Quiz
  4. Curved Mirrors
    7 Topics
    |
    1 Quiz
  5. Refraction of Light
    7 Topics
    |
    1 Quiz
  6. Dispersion of White Light
    2 Topics
    |
    1 Quiz
  7. Refraction of Light through Lenses
    6 Topics
    |
    1 Quiz
  8. Application of Lenses in Optical Instruments
    10 Topics
    |
    1 Quiz
  9. Sound Waves
    7 Topics
    |
    1 Quiz
  10. Vibration in Springs & Pipes
    4 Topics
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    1 Quiz

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SS2: PHYSICS – 3RD TERM Refraction of Light through Lenses Ways of Finding Focal Length of a Converging Lens
Lesson 7, Topic 6
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Ways of Finding Focal Length of a Converging Lens

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Topic Content:

  • Ways of Finding Focal Length of a Converging Lens

1. Quick Method:

This is a quick way of finding the focal length of a lens by focusing the image of a distant object on a screen using the lens. The lens is placed in front of a screen and its position is adjusted until a sharp image of the distant object is obtained on the screen. The distance between the screen and the focal length gives the approximate value of the focal length.

2. Lens Formula:

 

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