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प्रश्न
Define resolving power of a microscope and write one factor on which it depends
उत्तर
Resolving power of a microscope is the ability of the microscope to form separate image of two closely object placed near the microscope.
Resolving power of microscope is given by
`R.P. = (2μsinθ)/λ `
It is clear from the above equation, resolving power depends on the wavelength (λ) of the light used.
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संबंधित प्रश्न
Magnifying power of a simple microscope is inversely proportional to the focal length of the lens. What then stops us from using a convex lens of smaller and smaller focal length and achieving greater and greater magnifying power?
Why must both the objective and the eyepiece of a compound microscope have short focal lengths?
Define the magnifying power of a compound microscope when the final image is formed at infinity. Why must both the objective and the eyepiece of a compound microscope has short focal lengths? Explain.
How can the resolving power of a compound microscope be increased? Use relevant formula to support your answer.
In which of the following the final image is erect?
(a) Simple microscope
(b) Compound microscope
(c) Astronomical telescope
(d) Galilean telescope
The focal length of the objective of a compound microscope if fo and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument,
(a) L < u
(b) L > u
(c) fo < L < 2fo
(d) L > 2fo
Can the image formed by a simple microscope be projected on a screen without using any additional lens or mirror?
compound microscope consists of two convex lenses of focal length 2 cm and 5 cm. When an object is kept at a distance of 2.1 cm from the objective, a virtual and magnified image is fonned 25 cm from the eye piece. Calculate the magnifying power of the microscope.
How does the resolving power of a microscope change when
(i) the diameter of the objective lens is decreased?
(ii) the wavelength of the incident light is increased ?
Justify your answer in each case.
The near vision of an average person is 25 cm. To view an object with an angular magnification of 10, what should be the power of the microscope?
