Which of the following statements are true concerning electromagnetic waves? Che

Question

Which of the following statements are true concerning electromagnetic waves? Check all that apply. Electromagnetic waves can transfer momentum Electromagnetic waves travel in a vacuum with a definite and unchanging speed. The electric field at any point is perpendicular to the direction of wave travel. The magnetic field at any point is perpendicular to the direction of wave travel. The electric and magnetic fields at any point are parallel to each other. Electromagnetic waves can transfer energy When electromagnetic waves travel in vacuum, there is a definite, constant ratio between the magnitudes of the electric and magnetic fields.

Explanation / Answer

(1)

True

EM wave also transport momentum. The momentum flux is S/c. The magnitude of the momentum flux S/c is the amount of momentum that crosses a unit area perpendicular to the direction of propagation of the wave per unit time.

(2)

Electromagnetic waves travel in a vacuum with a definite and unchanging speed

true

(3) true

(4) true

(5) flase

(6) true

(7)

True because

E/B = c

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