NEET Physics Properties of EM Waves MCQ Question with Solution

What is the wavelength of an electromagnetic wave in free space if the magnetic field component is given by B_y = (2 × $10^{-7}$ ) T sin(0.5 × $10^3$ x + 1.5 × $10^{11}$ t)?

A

12.6 m

B

6.28 m

C

3.14 m

D

1.57 m

Correct Answer

Option A

Detailed Explanation

From the expression B_y = (2 × $10^{-7}$ ) T sin(0.5 × $10^3$ x + 1.5 × $10^{11}$ t), the wave number k is 0.5 × $10^3$ $m^{-1}$ . The wavelength λ is given by λ = 2π/k = 2π/(0.5 × $10^3$ ) = 12.6 m.

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NEET Physics Properties of EM Waves MCQ Question

Correct Answer

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