⚡ 雷电距离（声光时差）Lightning Distance Calculator

使用说明与常见问题How-to & FAQ

「雷电距离（声光时差）」是什么？What is the Lightning Distance Calculator tool?

看到闪电到听到雷声的秒数 × 声速 ≈ 距离。声速用 331.3 + 0.606 × T(°C) m/s，或近似"秒数 ÷ 3 ≈ 公里"。本地处理。Seconds between flash and thunder × speed of sound ≈ distance. Sound speed is 331.3 + 0.606 × T(°C) m/s, or roughly "seconds ÷ 3 ≈ kilometres". Processed locally.

如何使用「雷电距离（声光时差）」？How do I use the Lightning Distance Calculator tool?

填写看到闪电到听到雷声之间的秒数，按需填写气温，即可得到闪电的大致距离。结果会随输入实时更新。Enter the seconds between the flash and the thunder, and the air temperature if you like, to get roughly how far away the lightning is. The result updates as you type.

看不到闪电？No flash?

只听到雷声时无法可靠估计距离；同时观察声光差最准。Thunder alone cannot pin down the distance; watching for the flash is best.

能举个计算实例吗？Can you show a worked example?

例如在「雷电距离（声光时差）」中填 秒数 = 5，气温 °C = 20，结果区显示：距离：1,717.1 m = 1.717 km；英里：1.067 mi；近似（秒÷3）：1.67 kmFor example, entering Seconds = 5, Air temperature °C = 20 in the Lightning Distance Calculator gives: Distance: 1,717.1 m = 1.717 km; Miles: 1.067 mi; Rule of thumb (s ÷ 3): 1.67 km

哪些输入会被检查？Which inputs are validated?

「雷电距离（声光时差）」会检查这些输入——「秒数」：必须填写，须大于 0；「气温 °C」：必须填写；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Lightning Distance Calculator checks its inputs — "Seconds": required, must be greater than 0; "Air temperature °C": required; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「雷电距离（声光时差）」的设置：「秒数」默认 5；「气温 °C」默认 20。每次生成结果都按当前设置处理。Settings in the Lightning Distance Calculator — "Seconds" default 5; "Air temperature °C" default 20. The result always uses the current settings.

计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?

「雷电距离（声光时差）」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Lightning Distance Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.

「雷电距离（声光时差）」免费吗？需要注册吗？Is the Lightning Distance Calculator free? Do I need an account?

「雷电距离（声光时差）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Lightning Distance Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.