We know that light year is the distance travelled by light in one year and the speed of light is3*10^8 metre per second. Express one light year into kilometre. A A 9.46*10^(12)km B) 9.46*10^(18)km c) 9.46*10^(15)km D) 9.46*10^(13)km E)None of these 相关知识点: 试...
1 (a) One light-year is the distance travelled by light in a year. If there are 365 days in a year and the speed of light in vacuum is 300 000 km/s, calculate the distance of a light-year in metre. Express your answer in standard form.[3]Distance of a light year = (300000 ...
18. He had an awakening, a small enlightenment, while reading and reciting the Dharma Flower Sutra, and so he travelled a long distance, not minding the rigors of the journey, in order to visit Dhyana Master Shouchang and request certification from him. ...
To find the critical angle of the medium given the distances and times light travels in air and in the medium, we can follow these steps:Step 1: Calculate the velocities of light in both media The velocity of light in air (v1)
In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. Mileage A number of miles travelled or covered The car is in good condition, considering its mileage Distance The length of the space between two points You may have to ...
A light year is another unit for measuring distance. The distance travelled by light in a year is called a light year. 9.46×1017cm=1 light year . The mean radius of the earth’s orbit, measured in parsecs or pcs, is one second of arc. In astronomy, it is the unit of distance. ...
; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast" locomote, move, travel circulate, go around, spread - become widely ...
a) If the source is in space, what is the intensity of the light at 5.49 km? b) If the source is on the earth's surface, what is the intensity of the light at 5.49 km? c) Now su By how much should a pair of light rays from a common source differ in distance ...
How far will it travel in meters during this time? If a bug traveled a distance of 180 meters at a speed of 15 m/s, what was the time? If I'm going at a speed of 60 mph and I've been traveling for 1 hour, how far will I have gone? Calculate the distance travelled by a ...
A light year is the distance light would travel in a vacuum after one year. It is equal to some nine quadrillion meters (six trillion miles). This unit is described in more detail in the next section.Just the factsDistance is the sum of the length travelled around the path of motion. ...