Why is a prism binocular preferred over
a traditional binocular?
Answers
Advantages of a prism binocular over a traditional binocular:
Use of totally reflecting prism
(1) minimizes light loss and accomplishes the function of erecting an image in less space.
(2) increases the separation of the objectives, thereby increasing the stereoscopic effect for a better depth perception.
(3) doubles-back the light rays which enables long- focus objective lenses to be used in short tubes, thus giving higher magnifying power.
Answer:
1. If 2 telescopes are mounted parallel to each other so that an object can be seen by both the eyes simultaneously the arrangement is called binocular.
2. The length of each tube is reduced by using a set of totally reflecting prisms.
3. They provide intense, erect image free from lateral inversion.
f0-focal length of objective
fe- focal length eyepiece
4. Through a binocular we get 2 images of the same object from different angles at same time.
5. Their super position gives the perception of depth also with length and breadth.
6. Binocular vision gives proper 3D image.
7. By using total reflecting prisms there is no loss of intensity.