维恩峰值波长计算器
使用此维恩峰值波长计算器快速获得准确的计算结果。
峰值波长 (nm)
501.52 nm
Peak Wavelength (nm) vs Temperature
公式
## Wien's Displacement Law **lambda_max = b / T** where b = 2.8978 × 10⁻³ m·K (Wien's displacement constant). Hotter objects peak at shorter wavelengths. The Sun (5778 K) peaks at about 502 nm (green-yellow visible light). A human body (310 K) peaks at about 9.35 µm (infrared).
计算示例
The Sun at T = 5778 K.
- 01lambda_max = 2.8978e-3 / 5778
- 02= 5.016e-7 m = 501.6 nm
- 03This is in the green part of the visible spectrum.
常见问题
Why does the Sun appear white/yellow rather than green?
The Sun emits broadly across the visible spectrum. Our eyes integrate all wavelengths, perceiving white light. The atmosphere scatters blue, shifting the perceived colour toward yellow.
What temperature peaks in visible light?
About 4000-7000 K. Below this, the peak shifts to infrared (we see red). Above, it shifts to ultraviolet (we see blue-white).
Does Wien's law apply to non-blackbodies?
It is exact only for ideal blackbodies. Real objects may have emission lines or absorption features altering the spectrum, but the overall peak still roughly follows Wien's law.