Thermal Energy, Electromagnetic Radiation, and Global Warming (VCE SSCE Physics): Flashcards

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Thermal Energy, Electromagnetic Radiation, and Global Warming
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Wien's law equation

λmaxT=b\lambda_{\text{max}} T = b

Value of Wien's constant bb

2.898×1032.898 \times 10^{-3} m K

Blackbody

Absorbs all radiation & emits all frequencies efficiently

Earth's avg incoming solar power (W m2^{-2})

340340 W m2^{-2}

Solar energy reflected to space (W m2^{-2})

100100 W m2^{-2}

Earth's energy imbalance (W m2^{-2})

0.80.8 W m2^{-2}

Most abundant greenhouse gas

Water vapour (H2_2O)

Methane (CH4_4) greenhouse property

Small quantity, large back radiation contribution

Back radiation

Radiation from atmosphere back to Earth's surface

Temperature \uparrow, peak wavelength

Shifts to shorter wavelengths

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