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Home/ Questions/How many places can you put the lens to form a well-focused image of the candle flame on the wall?
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kttutoria
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kttutoriaExpert
Asked: April 8, 20222022-04-08T07:24:45+00:00 2022-04-08T07:24:45+00:00In: Physics

How many places can you put the lens to form a well-focused image of the candle flame on the wall?

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1.9-cm-tall candle flame is 1.8 m from a wall. You happen to have a lens with a focal length of 35 cm.

How many places can you put the lens to form & well- focused image of the candle flame on the wall?


♦ Relevant knowledge

  • Refraction of light is a phenomenon in which light rays traveling from one transparent medium to another are broken at the interface between the two media.
  • Lenses made of transparent material (glass or plastic) are bounded by two spheres (one of which can be flat).
    Converging lenses have a thinner edge than the middle.
  •  Transmission of three special rays of light through a converging lens:
    1. When the ray reaches the optical center, the reflected ray continues to propagate in the direction of the incident ray.
    2. An incident ray parallel to the principal axis will emerge through the focal point.
    3. Rays passing through the focal point will emerge parallel to the principal axis.
  •  Image of an object formed by a converging lens
    1. Objects placed out of focus give a real image, opposite to the object.
    2. Objects placed in the focal range give a virtual image, larger than the object and in the same direction as the object.
    3. When the object is placed very far from the lens, the real image is located at a distance equal to the focal length from the lens.
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    kttutoria Expert
    2022-04-08T07:32:52+00:00Added an answer on April 8, 2022 at 7:32 am

    Here is my answer

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