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IUT_20-21
HSC - পদার্থ বিজ্ঞান ২য় পত্র
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অধ্যায়-০৭ঃ ভৌত আলোকবিজ্ঞান
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The intensity of the waves from a point soruce at a distance d from the soruce is I. What is the intensity at a distance 2d from the source?
A.
1
2
\frac{1}{2}
2
1
B.
1
4
\frac{1}{4}
4
1
C.
41
41
41
D.
21
21
21
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The intensity of the waves from a point soruce at a distance d from the soruce is I. What is the intensity at a distance 2d from the source?
