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Electromagnetic (EM) Spectrum
- Gamma rays (smallest λ, highest frequency)
- X-rays
- UV
- Visable
- IR (near, mid, thermal)
- Microwave
- TV/radio (largest λ, lowest energy)
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Basic λ theory equation
- C = vλ
- C= volcity of light
- v- frequencey (cycles/sec)
- λ- wavelength (m/cycle)
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Q = hc/λ
longer the wavelength the lower the energy
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E
- Irradiance (W/m2)
- incoming
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M (or I)
- Radiant Exitance (W/m2)
- out
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L
- Radiance (W/(m2-sr))
- the angle
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Eλ
Spectral Irradiance (W/(m2-mm)
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Mλ
Spectral Radiant Exitance (W/(m2-mm-sr))
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Lλ
Spectral radiance (W/(m2-mm-sr))
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three fates of sun's energy
- reflected
- absorbed
- Transmitted
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