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What is myopia? - Physics

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प्रश्न

What is myopia?

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उत्तर

Myopia (or) short-sightedness is a vision defect in which a person can see nearby objects clearly but cannot see the distant objects clearly beyond a certain point.

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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 a terrestrial telescope and an astronomical telescope?


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 the astronomical telescope?


Why is oil-immersed objective preferred in a microscope?


What is hypermetropia?


What is astigmatism? What is its remedy?


Obtain the equation for resolving the power of the microscope.


Discuss about astronomical telescope.


Mention different parts of the spectrometer.


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?


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


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 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 ______.


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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