SAN DIEGO, CA— The Green Flash is a great breakfast spot on the Pacific Beach boardwalk in San Diego. It is also an optical phenomenon seen shortly after sunset or before sunrise. "It happens ...

The Green Flash When the sun's disk is disappearing at sunset, or appearing at sunrise, its top sometimes momentarily turns a brilliant green. The flash results from dispersion of sunlight in air ...

The green flash is another example of an optical phenomenon that sometimes occurs around the moment of sunset or sunrise. It lasts for no longer than two seconds. So, what is it exactly ...

So much has been written about the green-ray at sunset that I am somewhat diffident about adding anything. But as I find myself unable to accept the orthodox explanation of the phenomenon usually ...