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	Topic Title	Forum
	Can colors develop in a vacuum? By Mitko Gorgiev 1 week ago \| Last Post: 1 week ago	Light and colors
	No, colors cannot develop in vacuum, just as the s... 1 week ago By Mitko...
	What is an achromatic doublet? By Mitko Gorgiev 2 weeks ago \| Last Post: 2 weeks ago	Light and colors
	Consider the following experiment: in a room, in w... 2 weeks ago By Mitko...

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