What is the name of the process by which energy reaches the walls of the house directly from the sun ?

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Here is my answer to another similar post.

Since this is not my area of expertise, I searched Google under the key words "heat convection" to get these possible sources:

http://sol.sci.uop.edu/~jfalward/heattransfer/heattransfer.html
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatra.html
http://en.wikipedia.org/wiki/Heat_transfer
(Broken Link Removed)

I hope this helps. Thanks for asking.

The word you are looking for may be INSOLATION. (Note the spelling diffrence from "insulation").

It could also be just "radiation", one of the three forms of heat transfer -- along with convection and conduction.

The process by which energy reaches the walls of a house directly from the sun is called radiation. Radiation is one of the three forms of heat transfer, along with convection and conduction.

To find this answer, you could have searched for terms like "how does energy from the sun reach house walls" or "heat transfer from sun to house walls". This would have led you to articles or websites explaining the different forms of heat transfer, including radiation as the method by which energy from the sun reaches the walls of a house.