What is the definition of energy stored in chemical bonds of molecules?

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.

Diverging mirrors and lenses always produce images

Which system of units is used by only a small number of countries in the world, including the u.s.