Sky looks blue due to [MNR 1986; MP PET 1992]
Dispersion effect
Reflection
Transmission
Scattering
Sky looks blue due to scattering of light by dust particles present in the atmosphere.
Sky looks blue due to:
In the above reaction 'X' stands for
[CPMT 1986, 2001; MP PET 1992;KCET (Engg./Med.) 2000]