对神话光速的the speed of light, 它相当于the (speed of light), 这里的speed of light相当于sun, moon那样的专有名词。the speed of light也可以解读为“光所拥有的速度”，这就如同the speed of water, the speed of a car一样的结构。此时， the speed of light=light's speed。对“光所拥有的速度...
The speed of light in a vacuum is about ___. A. 300,000 kilometers per second B. 300,000 meters per second C. 30,000 kilometers per second D. 3,000 kilometers per second 相关知识点: 试题来源: 解析 A。光在真空中的速度约为 300,000 千米每秒,这是物理学中的基本常识,B 选项米...
The speed of light in vacuum is approximately ___. A. 300,000 kilometers per second B. 3,000 kilometers per second C. 300 kilometers per second D. 30 kilometers per second 相关知识点: 试题来源: 解析 A。真空中光速约为 30 万千米每秒。其他选项数值错误。反馈...
百度试题 结果1 题目The speed of light in a vacuum is approximately ___ meters per second.相关知识点: 试题来源: 解析 答案:299,792,458 反馈 收藏
百度试题 结果1 题目The speed of light in a vacuum is approximately ___ meters per second.相关知识点: 试题来源: 解析 答案:299,792,458 反馈 收藏
百度试题 结果1 题目The speed of light in a vacuum is approximately: A. 300,000 km/s B. 3,000,000 km/h C. 299,792,458 m/s D. 30,000,000 m/s 相关知识点: 试题来源: 解析 C 反馈 收藏
The speed of light in a vacuum is approximately ___. A. 300,000 kilometers per second B. 3,000 kilometers per second C. 30 kilometers per second D. 3 kilometers per second 相关知识点: 试题来源: 解析 A。解析:光在真空中的速度约为 30 万千米每秒。其他选项的速度都远小于光在真空中...
The speed of light in vacuum is approximately 300,000 kilometers per second. Which of the following statements is correct about the speed of light? A. It is always the same regardless of the medium. B. It is slower in air than in vacuum. C. It is faster in water than in vacuum. ...
A. The speed of light increases. B. The speed of light decreases. C. The wavelength of light increases. D. The frequency of light changes. 相关知识点: 试题来源: 解析 B。光从空气进入水中时,速度会减小,选项 A 错误;波长会变短,选项 C 错误;频率不变,选项 D 错误。反馈...
Light travels at a speed which is about a million times faster than the speed of sound.In one second, light travels about 300,000 kilometres.But sound travels only 0.344 kilometres .You can get some idea of this difference by watching the start of a race. If you Stand some distance(距离...