NAO vol 4 Anti-reflective lenses and
treatments worksheet Exam
Questions and Answers 100% PASS
Which is a correct statement concerning light waves that are more than 20 feet
from their source? - CORRECT ANSWER-they have a flat wavefront
What is the range of visible wavelengths the human eye is sensitive to? -
CORRECT ANSWER-380nm to 760nm
Which of the following occurs to the greatest degree when light encounters a lens
surface? - CORRECT ANSWER-transmitted
Lens reflections increase in brightness and intensity as _____ - CORRECT
ANSWER-the refractive index of the lens' material becomes higher
How much light does a 1.74 index lens reflect? - CORRECT ANSWER-15.7%
On what optical characteristic are AR treatments based upon? - CORRECT
ANSWER-destructive interference
What does the term "broadband" mean in regard to AR treatments? - CORRECT
ANSWER-a reduction of surface reflections over the entire visible spectrum
Which type of glare does AR treatment eliminate? - CORRECT ANSWER-
distracting
, Where is ultra-violet found in the electro-magnetic spectrum? - CORRECT
ANSWER-below violet
When light is reflected back towards the wearer it can _____ - CORRECT
ANSWER-compromise vision and reduce visual performance
Who is credited with being the inventor of AR treatment? - CORRECT
ANSWER-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. - CORRECT
ANSWER-the square root
How thick are today's modern AR lens treatments? - CORRECT ANSWER-0.2 to
0.3 microns
What coating material was used to create early AR lenses? - CORRECT
ANSWER-Magnesium fluoride
Each layer of modern AR treatment is composed of a different material of either
_____ - CORRECT ANSWER-silicone dioxide or a metal oxide
How do modern AR lenses prevent crazing of the AR treatment on plastic lenses?
- CORRECT ANSWER-a special hard coating is used that acts as a transition
between the glass-like AR treatment and the plastic lens
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
treatments worksheet Exam
Questions and Answers 100% PASS
Which is a correct statement concerning light waves that are more than 20 feet
from their source? - CORRECT ANSWER-they have a flat wavefront
What is the range of visible wavelengths the human eye is sensitive to? -
CORRECT ANSWER-380nm to 760nm
Which of the following occurs to the greatest degree when light encounters a lens
surface? - CORRECT ANSWER-transmitted
Lens reflections increase in brightness and intensity as _____ - CORRECT
ANSWER-the refractive index of the lens' material becomes higher
How much light does a 1.74 index lens reflect? - CORRECT ANSWER-15.7%
On what optical characteristic are AR treatments based upon? - CORRECT
ANSWER-destructive interference
What does the term "broadband" mean in regard to AR treatments? - CORRECT
ANSWER-a reduction of surface reflections over the entire visible spectrum
Which type of glare does AR treatment eliminate? - CORRECT ANSWER-
distracting
, Where is ultra-violet found in the electro-magnetic spectrum? - CORRECT
ANSWER-below violet
When light is reflected back towards the wearer it can _____ - CORRECT
ANSWER-compromise vision and reduce visual performance
Who is credited with being the inventor of AR treatment? - CORRECT
ANSWER-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. - CORRECT
ANSWER-the square root
How thick are today's modern AR lens treatments? - CORRECT ANSWER-0.2 to
0.3 microns
What coating material was used to create early AR lenses? - CORRECT
ANSWER-Magnesium fluoride
Each layer of modern AR treatment is composed of a different material of either
_____ - CORRECT ANSWER-silicone dioxide or a metal oxide
How do modern AR lenses prevent crazing of the AR treatment on plastic lenses?
- CORRECT ANSWER-a special hard coating is used that acts as a transition
between the glass-like AR treatment and the plastic lens
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
