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What is the remedy of myopia?

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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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अध्याय 7: Wave Optics - Evaluation [पृष्ठ १०४]

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

संबंधित प्रश्न

Answer the following question in detail.

How does magnifying power differ from linear or lateral magnification?


Answer the following question in detail.

What is a terrestrial telescope and an astronomical telescope?


Answer the following question in detail.

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


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?


What is the near point focusing?


Why is oil-immersed objective preferred in a microscope?


What is the use of collimator in a spectrmeter?


What is hypermetropia?


What is the remedy of hypermetropia?


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


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.


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 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 ______.


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 ______.


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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