electricity - What makes the speed of lightning different to the …
2021年12月4日 · This slows the propagation of electricity in a wire. In copper, electricity travels at about $1/3$ the speed of light. Lightning advances much slower than that. If a bolt of lightning advances into newly ionized channel of air, charges build up at the end of the channel. Before the lightning can advance further, more air must be ionized.
How fast does lightning travel? - Answers
2024年5月20日 · Depending on air conditions, the typical lightning bolt moves at 224,000 mph -- or about 3,700 miles per second.However, the light you see from the lightning obviously travels at the speed of ...
visible light - Why and how fast does lightning propagate?
2019年2月7日 · How "quickly" does lightning propagate, and what are the main contributing factors to the propagation speed (e.g density of clouds etc)? What exactly is propagating? It can't be light, since it's much too fast, so somehow the "sequence of …
Without seeing the lightning, can you tell how far away it struck by ...
2014年3月21日 · The sound speed in air is a relatively constant $343\tfrac{m}{s}=0.21\tfrac{mi}{s}$. Even if the dispersion were relatively high, you would need to know something about the way the thunder sounded when it started.
What is faster the speed of light or the blink of a human eye
2024年6月15日 · A lightning bolt is faster than the blink of an eye as it travels at a speed of about 224,000 miles per hour, whereas a blink typically lasts around 100-150 milliseconds. Which is faster and why ...
What is faster the speed of lightning or the speed of sound?
2023年8月11日 · Lightning travels at the speed of light, which is approximately 299,792 kilometers per second, while thunder travels at the speed of sound, approximately 343 meters per second.
Speed of light vs speed of electricity - Physics Stack Exchange
2017年9月24日 · So it is normally lower, but not too much lower than the speed of light in the vacuum. The speed also depends on the cable construction. The cable geometry and the insulation both reduce the speed. Good cables achieve 80% of the speed of light; excellent cables achieve 90%. The speed does not directly depend on the voltage or resistance.
Why does lightning cause sound? - Physics Stack Exchange
2022年1月27日 · The sound barrier theory is complete nuts. However, lightning does not travel at the speed of light. In fact, when the voltage between the cloud and the Earth reaches a critical level, many small low-intensity lightning bolts propagate more or less randomly downwards, ionizing the air along the way, forming a channel of conductive ionized air.
Relativity of Simultaneity - Why doesn't the train/lightning …
2023年9月7日 · My basic, high-level understanding of special relativity is that space/time must be malleable in order to preserve the constant speed of light regardless of reference frame. Working from that understanding, the train & platform example where a flash of light originates from the center of the train makes sense to me.
Is anything faster than a speeding bullet? - Answers
2024年5月21日 · The speed of sound is significantly slower than the speed of a bullet. On average, the speed of sound is around 343 meters per second (1235 km/h) in air, while the speed of a bullet can range from ...