(a) Sirius, one of the hottest stars known, has a black body radiation spectrum with a maximum wavelength Amax = 2600 Å. Find the energy emitted from one square meter of this star in one second in kJ/s. (b) How many moles of photons are emitted in 20 seconds from a red LED of 180 mW (milliwatts) with a wavelength of 660 nm? (W =J/s).
(a) Sirius, one of the hottest stars known, has a black body radiation spectrum with a maximum wavelength Amax = 2600 Å. Find the energy emitted from one square meter of this star in one second in kJ/s. (b) How many moles of photons are emitted in 20 seconds from a red LED of 180 mW (milliwatts) with a wavelength of 660 nm? (W =J/s).
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Transcribed Image Text:(a) Sirius, one of the hottest stars known, has a black body radiation
spectrum with a maximum wavelength Amax = 2600 Å. Find the energy emitted from
one square meter of this star in one second in kJ/s. (b) How many moles of photons are
emitted in 20 seconds from a red LED of 180 mW (milliwatts) with a wavelength of
660 nm? (W =J/s).
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