Question 105: EM waves

Question

Electric field in a plane electromagnetic wave is given by E = 50 sin(500x $$-$$ 10 $$	imes$$ 10
10
t) V/m The velocity of electromagnetic wave in this medium is :
(Given C = speed of light in vacuum)

Accepted Answer

$$V = {\omega  \over K} = {{10 	imes {{10}^{10}}} \over {500}} = 2 	imes {10^8}$$
$$V = {{2C} \over 3}$$.

Answer

$${3 \over 2}$$C

Answer

C

Answer

$${2 \over 3}$$C

Answer

$${C \over 2}$$

EM waves

Electric field in a plane electromagnetic wave is given by E = 50 sin(500x $- 10 \times$ 10 10 t) V/m The velocity of electromagnetic wave in this medium is : (Given C = speed of light in vacuum)

Choose the correct answer: