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The focal length of the eye lens in Huygen’s
eye-piece is 3 cm. Calculate i) focal length
of field lens, ii) distance be

By Ava

The focal length of the eye lens in Huygen’s
eye-piece is 3 cm. Calculate i) focal length
of field lens, ii) distance between the
lenses.
O 3 cm & 6 cm resp.
O 9 cm & 3 cm resp.
O 6 cm & 9 cm resp.
O 9 cm & 6 cm resp.​

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Ava

72. 4 रु० प्रति किलो बिकनेवाली चीनी अब 5 रु० प्रतिकिलो बिक रही
है। चीनी की दर में कितने प्रतिशत की वृद्धि हुई ?​

27. The equation of a line making an intercept of 3 on y-
axis and inclined at 45° to X-axis is….
a) y=x-1 b) y=x+3 c)

2 thoughts on “The focal length of the eye lens in Huygen’s<br />eye-piece is 3 cm. Calculate i) focal length<br />of field lens, ii) distance be”

  1. Effective focal length, F=3cm

    For Huygens eyepiece, if focal length of field lens is f, then effective focal length F= 2
    f

    ​ => f=2F=6cm=0.06m

    Focal power of field lens =
    1f

    ​ = 16.7D

    O 3 cm & 6 cm resp is the answerr.

    Reply

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