1.

Complete the following statements : When the sun is setting, the light from it has to travel a ................ thickness of the earth's atmosphere and only ............ wavelength .............. light is able to reach us. Sunset is therefore ............

Answer» Complete the following statements :
When the sun is setting, the light from it has to travel a ................ thickness of the earth's atmosphere and only ............ wavelength .............. light is able to reach us. Sunset is therefore ............


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