Coloring a white beam...

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Hello.
A white beam of intensity 'X' made to pass trough a purple colored 'filter' of 'Y' nm yields a 'Z' amount of energy at target.

How different is the level of energy at target for a purple laser of same 'Y' nm ? In other words; to make a purple laser and a colored white beam hit the same target with same energy, do they need to be -like 1-to-1000- difference in power at source ? Or can never happen ?

 

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Are you just trolling the Forum with questions based upon lack of comprehension, knowledge of what you are talking about and basing your questions on some imagined/imaginary world that doesn't exist?

I don't mean to be short with you or disrespectful but you need to do enough research/homework to be able ask a question about the real world. If you mix up terms and concepts that are not the same and you are pretending they are the same nobody can even begin to give you a real world answer.

For starters have a look at: https://www.edmundoptics.com/knowle...aEaemcLSc6003vujKV93bXCHCMeQqOR-RIrIa9B5qs8-H

PS: A purple filter in front of a white light source does not create a nm wavelength/frequency of light.
You are confusing laser properties and characteristics with human visual system and perception properties, --apples and oranges different. Color is not a physical property, it is the brain’s interpretation of different wavelengths/frequencies of light. Color names are words/symbols for that brain activity.