10. A light source emits a light wave with frequency ∫₀ to an observer. At the same time, the observer moves toward the light source with speed v = 1/2 c, where c is the speed of light. What is the frequency observed by the observer? (A) (B)(C) f₀ (D)(E)

8. As shown, a charge particle q is inject into a space with uniform electric field E = E₀ x, where E₀ is the absolute value of the electric field and x is the unit vector along the x-axis. The initial velocity of the particle is v = v₀y, where y is the unit vector along the y-axis. A magnetic field B is applied into the same space to maintain the velocity of the particle. Which one of the following fields is the correct one? (A) B =(B) B = (C) B =(D) B =(E) B =

10. A light source emits a light wave with frequency ∫₀ to an observer. At the same time, the observer moves toward the light source with speed v = 1/2 c, where c is the speed of light. What is the frequency observed by the observer?

(A)
(B)
(C) f₀
(D)
(E)

相關試題

相關試卷