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Why is the sky red after a volcanic Eruption?
Transcript of Why is the sky red after a volcanic Eruption?
A volcanic eruption gives off sulpher dioxide into the atmosphere, which can react to form sulphate aerosols, which are tiny particles suspended in the air. Ash and aerosols scatter the suns rays, so it is more likely to see orange and red colours, rather than blues and purples. When light from the sun passes through a greater thickness of the atmosphere, more rays of short wavelengths of visible light (blue and violet) is removed by scattering before it reaches your eyes, leaving behind long wavelengths of visible light (red and orange).This is also reflected off of clouds making them red too. When volcanic ash is the air it thickens the atmosphere and can be reflected off of the particles, which cause the same effect as a sunrise or sunset.
Eyjafjallajokull volcanic eruption FIN