Question

why does only a small particle of the total insulation reach on the surface of the earth?...​

Answer 1

Answer:

Sun radiates energy in all direction uniformly.  

Let r be the distance between sun and earth,  therefore sun radiates energy in spherical area around it.

So small amount of energy is incident on earth upper atmosphere which reaches to earth, therefore we only get small part of sun energy.

hope it heelps you

please mark it brainliest

with great love and support dear