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An EM wave travelling through a medium h...

An EM wave travelling through a medium has electric field vector. `E_y = 4 times 10^5 cos (3.14 × 10^8 t – 1.57 x) N//C`. Here x is in m and t in s. Then find :
Wavelength

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CBSE COMPLEMENTARY MATERIAL-ELECTROMAGNETIC WAVES AND OPTICS-NUMERICALS
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