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If the focal length of the objective len...

If the focal length of the objective lens and the eye lens are 4 mm and 25 mm respectively in a compound microscope. The length of the tube is 16 cm . Find its magnifying power for relaxed eye position

A

32.75

B

327.5

C

0.3275

D

None of these

Text Solution

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The correct Answer is:
b
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Knowledge Check

  • The focal length of the objective and the eyepiece of a microscope are 4mm and 25mm respectively.If the final image is formed at infinity and the length of the tube is 16cm the magnifying power of the microscope will be

    A
    `-327.5`
    B
    `-32.75`
    C
    `-3.275`
    D
    `32.75`

  • If the focal length of objective lens is increased then magnifying power of

    A
    Microscope will increase but that of telescope decrease
    B
    Microscope and telescope both will increase
    C
    Microscope and telescope both will decrease
    D
    Microscope will decreases but that of telescope will increase

  • The focal length of the objective lens of a compound microscope is

    A
    Equal to the focal length of its eye piece
    B
    Less than the focal length of eye piece
    C
    Greater than the focal length of eye piece
    D
    Any of the above three

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