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NAO Vol 4 Anti-Reflective Lenses And Treatments Worksheet: Q’s And A’s
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NAO Vol 4 Anti-Reflective Lenses And Treatments Worksheet: Q’s And A’s
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NAO Vol 4 Anti-Reflective Lenses And TreatmentsWorksheet: Q’s And A’s
Which is a correct statement concerning light waves that are more than 20
feet from their source? Right Ans - they have a flat wavefront
What is the range of visible wavelengths the human eye is sensitive to?
Right Ans - 380nm to 760nm
Which of the following occurs to the greatest degree when light encounters a
lens surface? Right Ans - transmitted
Lens reflections increase in brightness and intensity as _____ Right Ans - the
refractive index of the lens' material becomes higher
How much light does a 1.74 index lens reflect? Right Ans - 15.7%
On what optical characteristic are AR treatments based upon? Right Ans -
destructive interference
What does the term "broadband" mean in regard to AR treatments? Right
Ans - a reduction of surface reflections over the entire visible spectrum
Which type of glare does AR treatment eliminate? Right Ans - distracting
Where is ultra-violet found in the electro-magnetic spectrum? Right Ans -
below violet
When light is reflected back towards the wearer it can _____ Right Ans -
compromise vision and reduce visual performance
Who is credited with being the inventor of AR treatment? Right Ans - carl
zeiss company
In order for an AR lens treatment to be effective, its index of refraction must
be_____ of the index of the material it is being coated upon. Right Ans - the
square root
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