Kia Orana and Welcome to our website! The Cook Islands Meteorological Service is a division of the Ministry of Transport. It is dedicated in providing you with the latest weather updates, forecasts and warnings for the Cook Islands. Since that first rainfall observation in 1899 in Rarotonga, more observations are now made so as to guide us to see what will happen tomorrow.
Definition of disallow. 1  transitive verb. 2  1 : to deny the force, truth, or validity of. 3  2 : to refuse to allow.
A limit is a barrier you cannot go beyond. Diffraction limited means diffraction is that barrier. You have reached the limit, so there is no way you can go beyond where you are. If your telescope does not produce a perfect diffraction pattern, it is not diffraction limited.In a perfect telescope 84% of the light from a star goes into the central diffraction disc and 16% goes into the diffraction rings. That gives a Strehl ratio of 100%.y intention here is to provide a way to define the term. diffraction limited. By John Sherman. Mel Bartels said: The term 'diffraction limited' has so many meanings that it is meaningless. http://www.bbastrodesigns.com/ratemirrors.html And how right he is.