One light year is the distance traveled by light in one year. If the speed of light is 3.00 times 10^8 m/s and 1 mile = 1.609 km, how many miles are in a light year? What is the velocity of a car going East for 50 miles in one hour?
speedMPH= (2.998 x 108x 1/1000 x 0.621 x 60 x 60) miles/hr speedMPH= 6.702 x 108miles/hr Answer The speed of light in miles per hour is 6.702 x 108miles/hr.
The speed of light is a universal constant in a vacuum, like the vacuum of space. However, light *can* slow down slightly when it passes through an absorbing medium, like water (225,000 kilometers per second = 140,000 miles per second) or glass (200,000 kilometers per second = 124,...
百度试题 结果1 题目What is the speed of light in a vacuum? A. 299,792 kilometers per second B. 299,792 meters per second C. 299,792 miles per hour D. 299,792 feet per second 相关知识点: 试题来源: 解析 B 反馈 收藏
How fast is this in miles per hour {eq}(miles / h) {/eq} ?Question:The speed of light is {eq}3.00 \times 10^8 \ m / s {/eq}. How fast is this in miles per hour {eq}(miles / h) {/eq} ?Speed of Light:The speed of light is regarded as...
According to the text, Miles thinks A. light photons don't slow down in a vacuum B. the speed of light isn't absolute for photons C. there is really a limit to the speed of light D. travelling photons keep an absolute rule of speed()3. How can people slow light efficiently? A. ...
speed of light- the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second light speed,c constant- a number representing a quantity assumed to have a fixed value in a specifie...
So, what is the speed of light? Light moves at an incredible 186,000 miles per second (300,000 kilometers per second), equivalent to almost 700 million mph (more than 1 billion km/h). That's fast enough to circumnavigate the globe 7.5 times in one second, while a typical passenger...
(6)___to reach the earth.(7)___the great distances(距离)in space,scientists have used the speed of light(8)___a measurement(测量)of distance.This measurement (9)___ a light year and is the distance that light can travel in one year.Light(10)___about 6 trillion(兆) miles a ...
The light travels as a wave with a definite speed. This speed varies if the medium of travel changes in its path. The speed of light gets slower if the medium is denser. The fastest speed of light is in the vacuum, c=3×108 m/s ...