Scenes of outer space explosions in movies are often accompanied by a loud sound. Which of the following best describes why a scene like this is not realistic, Scenes of outer space explosions in movies are often accompanied by a loud sound. Which of the following best describes why a scene like this is not realistic? A. Sound cannot produce vibrations. B. Sound needs a medium through which it can be transmitted. C. Sound is not produced when something explodes in air. D. Sound can travel through a vacuum.