View Single Post
  #1  
Old 25-12-2019, 10:25 PM
Bobbyoutback's Avatar
Bobbyoutback
Registered User

Bobbyoutback is offline
 
Join Date: Oct 2009
Location: Broken Hill
Posts: 376
Perfect mirror '' V " lesser mirror shock !

This must be an example of a Paradox , a perfect mirror performs less sometimes .
Iv'e come across this before regarding splitting doubles But getting better resolution shocked me

From rating mirrors by Mel Bartels
A perfect mirror results in 84% of the light in the Airy disk and 16% of the light in the rings. A less than perfect mirror places less light in the Airy disk and more in the rings. (Incidentally, the Airy disk can shrink for a bad mirror, resulting in better resolution for very fine detail in certain cases).

Opinions please

Bobby .
Reply With Quote