Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
`"v"_circ + "f"_"e"` = 6.5 cm ....(1)
m = `"v"_circ/"u"_circ xx "D"/"f"_"e"` [taking D = 25 cm]
`=> "m" = - [1 - "v"_circ/"f"_circ] "D"/"f"_"e"`
`100 = - [1 - "v"_circ/0.5] 25/"f"_"e"`
`100 "f"_"e" = - (1 - 2"v"_circ) xx 25`
`2"v"_circ - 4 "f"_"e" = 1` .....(2)
Solving equation (1) and (2) we can get,
v0 = 4.5 cm and fe = 2 cm
APPEARS IN
संबंधित प्रश्न
Define and describe the magnifying power of an optical instrument.
Answer the following question in detail.
How does magnifying power differ from linear or lateral magnification?
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 the 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 myopia?
What is hypermetropia?
Discuss about simple microscope and obtain the equations for magnification for near point focusing and normal focusing.
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 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
The magnifying power of a telescope is nine. When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm. The focal length of objective and eyepiece are 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 image formed by an objective of a compound microscope is ______.
