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What is hypermetropia?

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प्रश्न

What is hypermetropia?

अति संक्षिप्त उत्तर
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उत्तर

Hypermetropia (or) Long-sightedness is a vision defect in which a person can see distant objects clearly but cannot see the nearby objects clearly.

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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 46. | 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?


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


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 myopia?


What is astigmatism? What is its remedy?


Discuss about astronomical telescope.


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.


A compound microscope has a magnifying power of 100 when the image is formed at infinity. The objective has a focal length of 0.5 cm and the tube length is 6.5 cm. What is the focal length of the eyepiece.


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


A simple microscope is used to see the object first in blue light and then in red light. Due to the change from blue to red light, what is the effect on its magnifying power?


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:


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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