Computed <a href="https://en.wikipedia.org/wiki/Black-body_radiation" class="extiw" title="w:Black-body radiation">black body spectra</a> for T= 4000K, 5000K, 6000K and 7000K according to <a href="https://en.wikipedia.org/wiki/Planck%27s_law" class="extiw" title="w:Planck's law">Planck's law</a>. <a href="https://en.wikipedia.org/wiki/Wien_approximation" class="extiw" title="w:Wien approximation">Wien's</a> and <a href="https://en.wikipedia.org/wiki/Rayleigh%E2%80%93Jeans_law" class="extiw" title="w:Rayleigh–Jeans law">Rayleigh-Jeans approximations</a> are shown additionally as dashed lines.
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