Jawapan

  • Pengguna Brainly
2016-03-25T10:34:51+08:00

Ini Jawapan Diperakui

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Jawapan diperakui mengandungi maklumat yang boleh dipercayai dan diharapkan yang dijamin dipilih dengan teliti oleh sepasukan pakar. Brainly mempunyai berjuta-juta jawapan berkualiti tinggi, semuanya disederhanakan dengan teliti oleh ahli komuniti kami yang paling dipercayai, tetapi jawapan diperakui adalah terbaik di kalangan terbaik.
A specially designed lens that mounts under the stage and is usually movable in the vertical direction. It has an iris type aperture to control the diameter of the beam of light entering the lens system. By changing the size of the iris and moving the lens toward or away from the stage, the diameter and focal point of the cone of light that goes through the specimen can be controlled. Abbe condensers really become useful at magnifications above 400X. The condenser lens system should have a numerical aperture equal to or greater than the N.A. of the objective lens being used. All of our microscopes that go to 1000X use Abbe condensers with a 1.25 N.A.
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