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Answer the following question in detail. Define and describe the magnifying power of an optical instrument. - Physics

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प्रश्न

Answer the following question in detail.

Define and describe the magnifying power of an optical instrument.

व्याख्या
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उत्तर

Angular magnification or magnifying power of an optical instrument is defined as the ratio of the visual angle made by the image formed by that optical instrument (β) to the visual angle subtended by the object when kept at the least distance of distinct vision (α).

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Optical Instruments
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 9: Optics - Exercises [पृष्ठ १८६]

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बालभारती Physics [English] Standard 11 Maharashtra State Board
पाठ 9 Optics
Exercises | Q 3. (vii) | पृष्ठ १८६

संबंधित प्रश्‍न

Answer the following question in detail.

Obtain the expressions for magnifying power and the length of an astronomical telescope under normal adjustments.


Discuss about simple microscope and obtain the equations for magnification for near point focusing and normal focusing.


What is the near point focusing?


Why is oil-immersed objective preferred in a microscope?


What are the advantages and disadvantages of using a reflecting telescope?


What are the uses of spectrometer?


What is myopia?


What is the remedy of myopia?


What is hypermetropia?


What is astigmatism? What is its remedy?


Discuss about simple microscope and obtain the equations for magnification for near point focusing and normal focusing.


Obtain the equation for resolving the power of the microscope.


Discuss about astronomical telescope.


Mention different parts of the spectrometer.


Explain the experimental determination of the material of the prism using a spectrometer.


A light wave of wavelength λ is incident on a slit of width d. The resulting diffraction pattern is observed on a screen at a distance D. If linear width of the principal maxima is equal to the width of the slit, then the distance D is


There are four convex lenses L1, L2, L3 and L4 of focal length 2, 4, 6 and 8 cm, respectively. Two of these lenses from a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are respectively


When a convex lens of 12.5 cm focal length is used as a magnifying glass, normal eye can see an object clearly at a distance of 25 cm. The magnifying power of the instrument is ____________.


If astronomical telescope of length 1.53 m has magnifying power of magnitude 50, the values of fo and fe are ____________.


The magnifying power of a telescope is nine. When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm. The focal length of objective and eyepiece are respectively.


The magnifying power of a telescope is high if its objective and eyepiece have respectively ______.


Magnification produced by astronomical telescope for normal adjustment is 10 and length of telescope is 1.1 m. The magnification when the image is formed at least distance of distinct vision (D = 25 cm) is ______.


An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20. To the observer the tree appears:


The image formed by an objective of a compound microscope is ______.


In the adjoining figure, AB represents the incident ray, and BK is the reflected ray. If angle BCF = θ, then ∠BFP is given by ______.

 


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