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CBSE Class 12-science Answered

In this question I cannot undestand the portion which I have highlighted because according to my opinion  intensity at point P will be I=4Io cos^2(phii/2).
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Asked by Balbir | 31 Jan, 2018, 09:41: AM
answered-by-expert Expert Answer
Yes, you are correct. Intensity is given by begin mathsize 12px style I space equals space 4 I subscript 0 cos squared ϕ over 2 end style
4I0 is the central spot intensity (at point O). Required answer may be one-fourth of central intensity. Book which has given this problem had assumed the central spot intensity as I0
Answered by Thiyagarajan K | 31 Jan, 2018, 03:04: PM

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