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A astronmical telescope has objective an...

A astronmical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively To view an object 200 cm away from the objective ,the lenses must be separated by a distance:

A

54.0cm

B

37.3 cm

C

46.0 cm

D

50.0cm

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Knowledge Check

  • The astronomical microscope consists of objective and eyepiece. The focal length of the objective is

    A
    equal to that of the eyepiece
    B
    shorter than that of the eyepiece
    C
    greater than that of the eyepiece
    D
    five times shorter than that of eyepiece

  • Focal length of objective and eyepiece of telescope are 200 cm and 4 cm respectively. What is length of telescope for normal adjustment?

    A
    196 cm
    B
    204 cm
    C
    250 cm
    D
    225 cm

  • The focal lengths of the objective and the eyepiece of the telescope are 225 cm and 5 cm respectively. The magnifying power of the telescope will be

    A
    a. 49
    B
    b. 54
    C
    c. 35
    D
    d. 60

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