C. By total internal reflection. D. By scattering. 相关知识点: 试题来源: 解析 C。解析:文中提到 Optical fibers use light waves to transmit information. Light is sent through a thin glass or plastic fiber by total internal reflection.所以光在光纤中是通过全内反射传播的。反馈 收藏 ...
In the mid 1800s, Scottish physicist James Clerk Maxwell established that light is a form of electromagnetic energy that travels in waves. The question of how it manages to do so in the absence of a medium is explained by the nature of electromagnetic vibrations. When a charged particle vibra...
A. It travels in a curved line B. Light travels in a straight line C. It travels randomly D. Light travels in circles 相关知识点: 试题来源: 解析 B。解析:光沿直线传播是基本的科学知识。A选项“沿曲线传播”错误。C选项“随机传播”不符合光的传播特性。D选项“沿圆形传播”也是错误的。反馈...
waves or in small particles. They continued to study its behavior and decided that it probably travels in both waves and particles. Unlike sound, light doesn't need matter to help it along - it can travel through empty space, which is why the sun's light can get to us from outer ...
Scientist A: Light clearly moves in waves, see how it goes right through that pane of glass? Student rolls a ping pong ball through a square frame to simulate light going through glass. Scientist B: No, light travels in the form of particles! Anyone can tell that the particles bounce...
Light travels very fast. How fast does light travel? A. 300,000 kilometers per second B. 200,000 kilometers per second C. 100,000 kilometers per second D. 50,000 kilometers per second 相关知识点: 试题来源: 解析 A。光的速度是每秒 30 万千米。这是基本的科学常识。其他选项速度错误。
Light travels very fast. How fast does light travel? A. 300,000 kilometers per second B. 30,000 kilometers per hour C. 3,000 kilometers per minute D. 300 kilometers per second 相关知识点: 试题来源: 解析 A。光的速度是每秒 30 万公里。选项 B、C、D 速度都不对。科普阅读要记住一些...
Light travels very fast. How fast does light travel? A. 300 kilometers per second B. 3000 kilometers per second C. 300000 kilometers per second D. 30000 kilometers per second 相关知识点: 试题来源: 解析 C。解析:光传播得非常快。光的传播速度是 300000 千米每秒。选项 A、B、D 的速度都...
Light travels very fast. How fast does light travel? A. Very slowly. B. As fast as a car. C. As fast as a plane. D. Very fast. 相关知识点: 试题来源: 解析 D。光传播速度非常快;A 选项非常慢错误;B 选项和汽车一样快错误;C 选项和飞机一样快错误。
【精品】看听学lesson1&lesson2&lesson3&lesson4 星级: 9页 Lesson 11一lesson1lessonLesson 星级: 45 页 Lesson 33——Lesson 36 星级: 21 页 Lesson 41 --Lesson 48 星级: 15 页 Lesson 37 - Lesson 40 星级: 27 页 Lesson 3 How Does Light Travel - Carolina Curriculum 格式...