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8.Electromagnetic waves
easy

એક ઉદગમ $ 8.2×10^6 Hz$  આવૃત્તિના વિદ્યુતચુંબકીય તરંગોનું ઉત્સર્જન કરે છે, તો તરંગોની તરંગલંબાઈ ......

A

$36.6$

B

$40.5$

C

$42.3$

D

$50.9$

Solution

અહી, $\,{\text{c  =  3 }} \times {\text{ 1}}{{\text{0}}^{\text{8}}}{\text{ m }}{{\text{s}}^{{\text{ – 1}}}}{\text{ }}{\mathbf{f }}{\text{ =  8}}{\text{.2 }} \times {\text{ 1}}{{\text{0}}^{\text{6}}}{\text{ Hz }}$

હવે, $\lambda \,\, = \,\,\frac{c}{{f}}\,\, = \,\,\frac{{3\, \times \,\,{{10}^8}}}{{8.2\, \times \,{{10}^6}}}\,\, = \,\,\frac{{300}}{{8.2}}\,\,\, = \,\,36.\,6\,\,m$

Standard 12
Physics

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