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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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संबंधित प्रश्न
Answer the following question in detail.
Derive an expression for the magnifying power of a simple microscope. Obtain its minimum and maximum values in terms of its focal length.
Answer the following question in detail.
What is a terrestrial telescope and an astronomical telescope?
Discuss about simple microscope and obtain the equations for magnification for near point focusing and normal 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 the use of collimator in a spectrmeter?
What are the uses of spectrometer?
What is myopia?
What is the remedy of hypermetropia?
What is presbyopia?
Discuss about astronomical telescope.
Mention different parts 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.
If astronomical telescope of length 1.53 m has magnifying power of magnitude 50, the values of fo and fe are ____________.
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 ______.
