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Smoke rays, Alberta, Canada. Peg Zenko (Tangent
Photos) took this panorama from Whistler's Mountain in Jasper
National Park. Smoke from a fire in British Columbia scatters
the sunlight and makes the sunrays visible. The rays look bluish
because small smoke particles are Rayleigh
scatterers - they scatter blue much more strongly than longer
wavelength red light. ©Peg Zenko, shown
with permission.
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