Classification of stars (AQA A-Level Physics): Flashcards

Object that absorbs & emits all wavelengths of radiation

$P = \sigma A T^4$

$5.67 \times 10^{-8}$ W m$^{-2}$ K$^{-4}$

Surface area $A$ and fourth power of temp $T^4$

$\lambda_{\text{max}} T = 2.9 \times 10^{-3}$ m K

$2.9 \times 10^{-3}$ m K

Peak wavelength decreases (shorter wavelengths)

Shifts to shorter wavelengths

$I = \frac{P}{4 \pi d^2}$

Power per unit area