VIOLET
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VIOLET. RED. VISIBLE LIGHT IN THE ATMOSPHERE SCATTERING : WAVELENGTH>>MOLECULE SIZE(MS) INTENSITY -> 1 / W )4 -> BLUE SKIES &REDDENING IN GENERAL SCATTERING =EXTINCTION FOR STARS WAVELENGTH ~MS (EG DUST) INTESITY ->1 / W WE MUST COMPENSATE FOR MEASURING STELLARENERGY

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VIOLET

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Violet

VIOLET

RED

VISIBLE LIGHT IN THE ATMOSPHERE

SCATTERING: WAVELENGTH>>MOLECULE SIZE(MS)

INTENSITY -> 1 / W)4 -> BLUE SKIES &REDDENING IN GENERAL

SCATTERING =EXTINCTION FOR STARS

WAVELENGTH ~MS (EG DUST) INTESITY ->1 / W WE MUST COMPENSATE

FOR MEASURING STELLARENERGY

WAVELENGTH<< MS NO W DEPENDENCE( EG H2O = WHITE CLOUDS

ATM REFRACTION: BENDS LIGHT EG NEAR HORIZON

35’ SUN IS PHYSICALLY SET WHEN SEEN

TWINKLING- ANGULAR RESOLUTION LIMITED TO 1” IN GENERAL

TO MAX 0.25”

2” BEST STATEN ISLAND

meters

UV <290nm

Dissociate gases

And ionize them

e,.g.ozone absorbs

300 to 310 nm

IR- 1 micrometer

to 1 mm

Excite and get

absorbed

by

N2 O2 CO2

and

Especially H2O

Ionosphere acts like

conducting Shield.

.absorbs and reflects

Incoming radio

> 20 meters

Visible Atmospheric Window

Our eyes and Telescopes

Radio Window 1mm to 20 m

Radio Telescopes here


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