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The least distance of distant vision for...

The least distance of distant vision for a young adult with normal vision is ............

A

25 m

B

2.5 cm

C

25 cm

D

2.5 m

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Knowledge Check

  • The least distance of distinct vision for a young adult with normal vision is about …

    A
    25 m.
    B
    2.5 cm.
    C
    25 cm.
    D
    2.5 m.

  • Near point for a person having normal vision, D= …........

    A
    25 mm
    B
    25 cm
    C
    25 m
    D
    infinite

  • For normal vision, the near point is ............

    A
    25 cm
    B
    25 m
    C
    zero
    D
    infinite

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    A compound microscope consists of an objective lens of focal length 2.0 cm and an eyepiece of focal length 6.25 cm separated by a distance of 15cm. How far from the objective should an object be placed in order to obtain the final image at (a) the least distance of distinct vision (25cm), and (b) at infinity? What is the magnifying power of the microscope in each case?

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