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

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Thermal Energy, Electromagnetic Radiation, and Global Warming
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What type of radiation becomes trapped inside a greenhouse after being re-radiated?

Long-wavelength infrared radiation

What total power does Earth receive continuously from the Sun?

1.73×10171.73 \times 10^{17} W

What defines a blackbody?

Perfectly absorbs & emits all radiation

As temperature increases, how does the peak of a blackbody emission curve change?

Shifts to shorter wavelengths

What is the value of Wien's constant bb in Wien's law?

2.898×10−32.898 \times 10^{-3} m K

Where do the Sun's emissions peak compared to Earth's?

Sun: visible; Earth: infrared

What average solar energy does Earth receive per square meter?

340 W m−2^{-2}

What is the current energy imbalance causing global warming?

About 0.8 W m−2^{-2}

Which is the most abundant greenhouse gas in the atmosphere?

Water vapour (H2_2O)

Over what time period is climate typically measured?

30 years

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