How to calculate the speed of light?

The speed of light in vacuum is one of the oldest physical constants. Galileo once suggested that light should travel a distance of 7.5 km to measure its speed, but the equipment used was not perfect. In 1676, the Danish astronomer lomay first proposed an effective method to measure the speed of light, which was based on the eclipse of Jupiter's moon

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1. Is that faster than light? If a person goes against the light and the speed is V, then the speed of the photon relative to the person is C + V. although V is very small relative to the speed of light, it surpasses after all
2. Who, when and how does the speed of light work out? Who knows?
3. Do I reach the speed of light like this? Everyone knows that no one can reach the speed of light, but if I move to the left at half the speed of light and you move to the right at the same speed, then I'm not sure if you have reached the speed of light
4. Did Maxwell calculate the speed of light? I don't believe that one can calculate the speed of light by pure theory. Relativity only says that the speed of light is constant
5. The radius of the earth's orbit is often used in astronomy as a unit of length, called astronomical unit, to measure the distance between celestial bodies and the sun in the solar system
6. What is the sum of a number added, subtracted, and divided equal to 8.6?
7. It is known that the function f (x) is an odd function over [- 1,1] and monotonically decreases over the interval [- 1,0] If f (2m-3) + F (1-m) > 0, find the value range of real number M
8. Given the position of the number A.B.C on the number axis Moreover, the distance from B. C to the origin is equal, and | A-B | - | - a | - | B + C is simplified| Picture | - | - - | - | - | - | - | - → a b 0 c
9. Given that ABC is not equal to 0, the square of AX + BX + C = 0, the square of BX + CX + a = 0, the square of Cx + ax + B = 0, find its common root
10. English translation 1. We have been waiting for him all morning 2. How long has it rained? 3. How long has she been teaching English? 4. She has been writing this book since last week 5. He hasn't been working here all these years 6. What newspaper are you reading recently? 7. The old man worked in the park for two hours
11. Will the measured speed of light be faster than the actual speed? The first thing to say is that my idea is definitely wrong, but I really don't know what is wrong, so I want to discuss it with you. Anyone who is interested can say two sentences If the distance between the earth and the sun is s, and we know that the time required for light to pass from the sun to the earth is t, then we can calculate the speed of light as S / T = C, but due to the tardiness effect, the distance between the earth and the sun will be reduced to s', so the calculated speed of light is v = s' / T, because s'
12. The speed of light is so fast, but how is it measured? Please, thank you
13. How is the speed of light measured?
14. How is the speed of light measured
15. I want to know How is the speed of light measured
16. There are about 100 billion stars in the Milky way. The distance between the nearest star Centaurus and the sun is about 4.22 light years (1 light year ≈ 9.46 × 10 12 km). How many years will it take to get to Centaurus by supersonic plane? (365 calculations per year, the speed of supersonic plane is 10350 M / s, so three significant numbers are reserved.)
17. The neighbor star is the closest star to the earth. The light from the neighbor star reaches the earth about 4.3 years ago. How many km is the neighbor star from the earth
18. Apart from the sun, the nearest stars to the earth are () A. Altair B, Vega C, Andromeda D, and the nearest star in Centaurus
19. The nearest star outside the solar system to the earth is called the neighboring star, which is 3600, 13000, 13000 kilometers away from the earth. Q: how long does it take for the light from the neighboring star to reach the earth? (it is known that the speed of light is 300000 km / s, which is calculated by 30000000 seconds per year. The results are expressed by scientific notation.)
20. The principle of laser rangefinder is understood. The distance can be calculated by calculating the time taken to receive the reflected laser, but what we don't understand is how to send it back? When a flashlight is used to irradiate a plane mirror three or four meters away, it will reflect back light, but when it is used to irradiate ordinary objects such as tables and stools (especially in the bright outdoor environment), it will not be seen that the light emitted by a flashlight will reflect back. Even the common laser lamp similar to a flashlight can not see the reflected light when it is three or four meters away in this environment, Is the reflection ability of the lunar surface so strong? How does the object reflect back the emitted beam or something else