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What is the remedy of myopia? - Physics

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प्रश्न

What is the remedy of myopia?

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उत्तर

A myopia eye is corrected by using a concave lens of focal length equal to the distance of the far point F from the eye.

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Optical Instruments
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पाठ 7: Wave Optics - Evaluation [पृष्ठ १०४]

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सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
पाठ 7 Wave Optics
Evaluation | Q 45. | पृष्ठ १०४

संबंधित प्रश्‍न

Answer the following question in detail.

What is the limitation in increasing the magnifying powers of a simple microscope?


Answer the following question in detail.

What is the limitation in increasing the magnifying powers of a compound microscope?


What is the near point focusing?


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


What is the use of an erecting lens in a terrestrial telescope?


What is hypermetropia?


What is the remedy of hypermetropia?


What is presbyopia?


Mention different parts of the spectrometer.


Explain the preliminary adjustments of the spectrometer.


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


A compound microscope has a magnification of 30. The focal length of eye piece is 5 cm. Assuming the final image to be at least distance of distinct vision, find the magnification produced by the objective.


The near point and the far point for a person are 50 cm and 500 cm, respectively. Calculate the power of the lens the person should wear to read a book held in hand at 25 cm. What maximum distance is clearly visible for the person with this lens on the eye?


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 ____________.


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


The speed of light in media 'A' and 'B' are 2.0 × 1010 cm/s and 1.5 × 1010 cm/s respectively. A ray of light enters from medium B to A at an incident angle 'θ'. If the ray suffers total internal reflection, then ______.


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


A camera objective has an aperture diameter of d. If the aperture is reduced to diameter d/2, the exposure time under identical conditions of light should be made ______.


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