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By properly combining two prisms made of different materials, it is possible to:
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(a) Have dispersion without average deviation(b) have deviation without dispersion
(c) have both dispersion and average deviation.
Consider the case of prisms combined such that the refractive angles are reversed w.r.t. each other. Then, the net deviation of the yellow ray will be And, the net angular dispersion will be
Thus, by choosing appropriate conditions, we can have the above mentioned cases.
(c) have both dispersion and average deviation.
Consider the case of prisms combined such that the refractive angles are reversed w.r.t. each other. Then, the net deviation of the yellow ray will be And, the net angular dispersion will be
Thus, by choosing appropriate conditions, we can have the above mentioned cases.
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Question Text | By properly combining two prisms made of different materials, it is possible to: |
Topic | Ray Optics and Optical Instruments |
Subject | Physics |
Class | Class 12 |
Answer Type | Text solution:1 |
Upvotes | 27 |