Wednesday, June 24, 2015

கலைச்சொல் தெளிவோம் 205. இருநோக்கி – Binoculars:இலக்குவனார் திருவள்ளுவன்



binocular01

  1. prism
  2. Large objective lenses at front
  3. Focusing control knob
  4. Lenses
  5. Small eyepiece lenses at rear
(Left picture: Prism reflects beam, Light beam “folded” by prisms)


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