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प्रश्न
Explain the basic differences between the construction and working of a telescope and a microscope
उत्तर
| Telescope | Microscope |
| It is used for observing distant images of heavenly bodies such as stars and planets. |
It is used for observing magnifying |
| The objective lens has a large focal length and large aperture |
The objective lens has a small focal length and short aperture. |
| The eye lens used has small focal length and small aperture. | The eye lens used has moderate focal length and large aperture. |
| The distance between the objective lens and eye lens is adjusted to focus the object situated at infinity. | The objective and eye lens are kept at a fixed distance apart, whereas the distance of the objective lens from the object is adjusted to focus an object. |
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संबंधित प्रश्न
Why must both the objective and the eyepiece of a compound microscope have short focal lengths?
Suggest two ways by which the resolving power of a microscope can be increased?
In which of the following the final image is erect?
(a) Simple microscope
(b) Compound microscope
(c) Astronomical telescope
(d) Galilean telescope
A compound microscope forms an inverted image of an object. In which of the following cases it it likely to create difficulties?
Consider the following two statements :-
(A) Line spectra contain information about atoms.
(B) Band spectra contain information about molecules.
Can the image formed by a simple microscope be projected on a screen without using any additional lens or mirror?
The magnifying power of a converging lens used as a simple microscope is `(1+D/f).` A compound microscope is a combination of two such converging lenses. Why don't we have magnifying power `(1+D/f_0)(1+D/f_0)`?In other words, why can the objective not be treated as a simple microscope but the eyepiece can?
Define the magnifying power of a microscope in terms of visual angle.
A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again?
An angular magnification of 30X is desired using an objective of focal length 1.25 cm and an eye piece of focal length 5 cm. How will you set up the compound microscope for the final image formed at least distance of distinct vision?
