Traditional Culture Encyclopedia - Photography and portraiture - On October 1st, National Day, the audience can see colorful fireworks in the sky. What is the light phenomenon?
On October 1st, National Day, the audience can see colorful fireworks in the sky. What is the light phenomenon?
The propagation speed of light in air is 3×108m/s = 3×105km/s; Because light and sound are produced at the same time, and the propagation speed of light is much faster than sound, so the propagation time of light can be ignored. Then the distance from Xiao Wei to the fireworks blooming place is: S = vt = 340m/s× 3s = 1020m, so the answer is: 3x105; 1020.
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