Mesmerizing Saturday- it’s hard to imagine a blue sunset!


Mesmerizing Saturday- it’s hard to imagine a blue sunset!

Toh HL explains why sunsets and sunrises are red and not blue!

So round, spectacular, and mesmerizing
sometimes, shy, bashful behind the clouds
often ordinary, the reddish blaze disappearing 
as if in a hurry for another appointment?

Rayleigh scattering is the phenomenon
for during sunsets or sunrises, 
sunlight has to penetrate a thicker layer
of dust and water vapour in the atmosphere.

The red end of the colour spectrum
is scattered less compared to the blue end
Hence, red reaches our eyes easily 
as  it has a shorter wavelength than blue

It's hard to imagine a blue sunset! 

by Toh HL, co-author and photographer, 21 May 2021

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