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In astronomical telescope, the final ima...

In astronomical telescope, the final image is formed at

A

The least distant of distinct vision

B

The focus of objective ions

C

The focus of the eye lens

D

Infinity

Text Solution

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The correct Answer is:
D
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Draw a ray diagram of an astronomical telescope for the final image formed at least distance of distinct vision?

Draw a ray diagram to show the formation of image by an astronomical telescope when the final image is formed at the near point. Answer the following giving reasons : (i) Why the objective has a larger focal length and a larger aperture than the eyepiece ? (ii) What would be the effect on the resolving power of the telescope if its objective lens is

Knowledge Check

  • In an astronomical telescope, the final image for normal vision is formed at

    A
    the focus of the eye piece
    B
    the least distance of the distinct vision
    C
    the focus of the objective lens
    D
    infinity

  • Magnification achieved by an astronomical telescope is 6 when final image is formed at infinity. Distance between objective and eyepiece is 49 cm. Calculate focal lengths of objective and eyepiece.

    A
    42 cm and 7 cm
    B
    54 cm and 9 cm
    C
    72 cm and 12 cm
    D
    78 cm and 13 cm

  • For an astronomical telescope

    A
    Diameter of obejective lens =Diameter of eyepiece
    B
    Diameter of objective lens = Diameter of eyepiece
    C
    Diapemeter of objective lens =Diameter of eyepiece
    D
    Independent of diameter of lens

    • Similar Questions

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    (a) Draw the ray diagram of an astronomical telescope when the final images is formed at infinity. Write the expression for the resolving power of the telescope. (b) An astronomical telescope has an objective lens of focal length 20m and eyepiece of focal length 1 cm. (i) Find the angular magnification of the telescope. (ii) If this telescope is used to view the Moon, find the diameter of the image formed by the objective lens. Given the diameter of the Moon is 3.5 xx 10^(6) m and the radius of lunar orbit is 3.8 xx 10^(8)m .

    In a normal adjustment of a telescope, the final image is formed at ……………………………….

    In astronomical telescope final image is (1) Real erect (2) Real inverted (3) Virtual errect (4) Virtual inverted

    In a travelling microscope, the final image is formed at

    In Gallilean telescope, the final image formed is

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