QNT-25

Wien peak

Blackbody peak wavelength.

Reading speed

GoverningWien peak

Governing equation

\\lambda T=2.897\\times10^{-3}

where

T: T (K)
lam: Wien peak (nm)

Lecture brief

Historical brief

Planck (1900), Einstein’s photoelectric law, Bohr, de Broglie, Heisenberg and Schrödinger’s 1926 equation rebuilt matter as amplitude. These sheets are the first solvable models: wells, spin, tunneling, uncertainty. This sheet (QNT-25 — Wien peak) is the form associated with Wien peak. Working symbols: $T$ $\rightarrow$ $lam$ . Blackbody peak wavelength. Pedagogical SI sheet with a live model and a swept parameter.

Purpose

Purpose: compute

lam

from

T

in Quantum mechanics via

\\lambda T=2.897\\times10^{-3}

Blackbody peak wavelength. Use it when a real quantum mechanics question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

T = 5800.000\,\mathrm{K}

, the governing relation

\\lambda T=2.897\\times10^{-3}

yields

lam = 499.483\,\mathrm{nm}

. One governing identity, SI units, a single sweep on the sheet. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

T T5800 K

Outputs

Wien peak lam499.483 nm

Reading speed

Watch on YouTube

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Narration of this film

One governing identity, SI units, a single sweep on the sheet.

Blackbody peak wavelength. Pedagogical SI sheet with a live model and a swept parameter.

Reading speed

Watch on YouTube