What are the objective and the eye-piece in an optical instrument?
(N/A) In optical instruments like microscopes and telescopes,the objective and eye-piece are the two primary lenses or lens systems.
$1$. Objective: This is the lens (or lens system) placed closest to the object being observed. It forms a real,inverted,and magnified image of the object at a position that serves as the object for the eye-piece.
$2$. Eye-piece (or Ocular): This is the lens (or lens system) placed closest to the observer's eye. It acts as a simple magnifier,taking the image formed by the objective and producing a final,virtual,and highly magnified image that the eye can view comfortably.
$1$. Objective: This is the lens (or lens system) placed closest to the object being observed. It forms a real,inverted,and magnified image of the object at a position that serves as the object for the eye-piece.
$2$. Eye-piece (or Ocular): This is the lens (or lens system) placed closest to the observer's eye. It acts as a simple magnifier,taking the image formed by the objective and producing a final,virtual,and highly magnified image that the eye can view comfortably.
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Similar Questions
In a compound microscope,the focal lengths of two lenses are $1.5 \text{ cm}$ and $6.25 \text{ cm}$. An object is placed at $2 \text{ cm}$ from the objective and the final image is formed at $25 \text{ cm}$ from the eye lens. The distance between the two lenses is .............. (in $\text{cm}$).
When the length of a microscope tube increases,its magnifying power
Easy
View SolutionWhen the final image is formed at the least distance of distinct vision $(D)$ from the eye,the magnifying power of a simple microscope is ($f$ is the focal length of the lens):
In a Ramsden eyepiece, two plano-convex lenses, each of focal length $f$, are separated by a distance of $d = 2f/3$. If the separation distance is $12 \ cm$, what is the equivalent focal length (in $cm$) of the eyepiece?
DifficultTS EAMCET 2007
View SolutionMagnification of a compound microscope is $30$. The focal length of the eyepiece is $5 \, cm$ and the image is formed at the near point (distance of distinct vision) of $25 \, cm$. The magnification of the objective lens is:
Medium
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