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What is hypermetropia? - Science

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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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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 46. | 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 the limitation in increasing the magnifying powers of the astronomical telescope?


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


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


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


Mention different parts of the spectrometer.


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.


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


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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?


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 ______.


An object viewed from a near point distance of 25 cm, using a microscopic lens with magnification '6', gives an unresolved image. A resolved image is observed at infinite distance with a total magnification double the earlier using an eyepiece along with the given lens and a tube of length 0.6 m, if the focal length of the eyepiece is equal to ______ cm.


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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 ______.


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