The electric field of an electromagnetic wave in free space is given by E =10 (10^ 7 t+k…
Physics · NEET · NTA Exams — Electromagnetic Waves
The electric field of an electromagnetic wave in free space is given by \(\vec{E}=10 \cos \left(10^{7} t+k x\right) \hat{j}\) V/m where t and X are in seconds and meters respectively. It can be inferred that :
(i) the wavelength λ is 188.4 m
(ii) the wave number k is 0.33 rad/m
(iii) the wave amplitude is 10 V/m
(iv) the wave is propagating along +x direction Which one of the following pairs of statements is correct?
(i) the wavelength λ is 188.4 m
(ii) the wave number k is 0.33 rad/m
(iii) the wave amplitude is 10 V/m
(iv) the wave is propagating along +x direction Which one of the following pairs of statements is correct?
- (ii) and (iv)
- (i) and (ii)
- (ii) and (iii)
- (i) and (iii)
Answer
(A) (ii) and (iv)
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