Energy is the ability to do work. If an object possesses energy it possesses the ability to do work.

This is how energy is usually defined . This definition fits mechanical energy very well .

But I find it difficult to connect other forms of energy such as light energy , chemical energy, etc. to relate with work done .

I wonder how light or object with light has a capacity to do work?

Can someone clarify this ? Is there any other definition for energy that fits every where?



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