What is the speed of light? A. About 300,000 kilometers per second. B. About 3,000 kilometers per second. C. About 30,000 kilometers per second. D. About 3,000,000 kilometers per second. 相关知识点: 试题来源: 解析 A。解析:光速约为每秒 300000 千米。B、C、D 选项的数值都不...
What is the speed of light? A. About 300,000 kilometers per second. B. About 30,000 kilometers per second. C. About 3,000 kilometers per second. D. About 300 kilometers per second. 相关知识点: 试题来源: 解析 A。本题是关于光速的科普。光速约为 300000 千米每秒,其他选项的速度远...
题目What is the speed of light? A. 300,000 kilometers per second. B. 300,000 meters per second. C. 30,000 kilometers per second. D. 30,000 meters per second. 相关知识点: 试题来源: 解析 A。光的速度是 30 万千米每秒,所以答案是 A。B、C、D 选项的速度都不对。
百度试题 结果1 题目___ is the speed of light? A. What B. How much C. How fast D. How many 相关知识点: 试题来源: 解析 A。“光速是什么?”询问事物的内容用 what。反馈 收藏
题目Light travels very fast. What is the speed of light? A. 300,000 kilometers per second. B. 30 kilometers per hour. C. 3,000 meters per minute. 相关知识点: 试题来源: 解析 A。光的速度是每秒 30 万公里。其他选项速度不对。
What is the speed of light in a vacuum? A. 300,000 kilometers per second. B. 3,000 kilometers per second. C. 30,000 kilometers per second. D. 300 kilometers per second. 相关知识点: 试题来源: 解析 A。真空中光速是 30 万千米每秒。选项 B、C、D 数值错误。
What is the speed of light? A. 参厂调参厂调300000 kilometers per second.参厂调参厂调 B. 第任今现适京山八被代委第任今现适京山八被代委30000 kilometers per second.第任今现适京山八被代委第任今现适京山八被代委 C. 气心劳制行里提重花每全回道证往军气心劳制行里提重花每全回道证往军...
What is the speed of light in a vacuum? A. About 300,000 kilometers per second. B. About 3,000 kilometers per second. C. About 30,000 kilometers per second. D. About 3,000,000 kilometers per second. 相关知识点: 试题来源: 解析 A。本题考查对光速的了解。光在真空中的速度约为...
Little wonder then why the speed of light is the metric used to determine astronomical distances. When we say a star like Proxima Centauri is 4.25 light years away, we are saying that it would take – traveling at a constant speed of 1.07 billion km per hour (670,616,629 mph) – about...
Speed of Light | Distance & Light-Years from Chapter 8 / Lesson 3 25K Learn how fast light travels and find the speed of light in meters or miles per second. Understand the significance of light-years and lookback time with examples. Related...