Molecule in a Box

[@mortezakhoshbin]

Clever comparison example!

[@PhysicalChemistry]

This example is just the starting point for understanding gases, as covered in some of the later lectures.

[@GulzarAhmad-sw1kh]

isn't 375nm is on the 'blue-end' of the spectrum i.e. UV?

[@PhysicalChemistry]

Yes, 375 nm is in the UV, just off of the blue or violet end of the visible spectrum. Because anthracene absorbs at these energies and higher, it does **not** absorb visible light. So anthracene is a colorless compound (at least in the gas phase -- the PIB model only considers individual molecules far from any others).

[@chemist4919]

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