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NAO (Physics) VOLUME IV QUESTIONS CORRECTLY ANSWERED.
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NAO (Physics) VOLUME IV QUESTIONS CORRECTLY ANSWERED.
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NAO (Physics) VOLUME IV QUESTIONSCORRECTLY ANSWERED.
Features and benefits of trivet include_____:
Correct Answer -superior optics, impact resistance, ultra-light weight (all of
the above)
Visible glare can be dangerous because it can not only wash out colors, but
in some instances can cause _____:
Correct Answer -photokeratitis
Polarized filters are made by stretching thin sheets of _____ in one meridian:
Correct Answer -polyvinyl alcohol
Two methods for orienting polarized filters into lenses include
Correct Answer -laminating and molding
As light reaches a polarizing filter, _____
Correct Answer -light in only one plane will pass through, having the other
absorbed by the filter, thereby reducing glare
Polarized lenses may not be recommended for which visual task?
Correct Answer -any visual task that may include using LCD instrumentation
Photochromic lenses were introduced by _____ in_____
Correct Answer -corning/1964
, The color change in photochromic lenses occurs as a result of _____ that are
added to the molten glass:
Correct Answer -silver halide crystals
The first successful plastic photochromic lenses were introduced by _____ in
_____
Correct Answer -transitions/1991
Imbibed technology means that photochromic technology is _____
Correct Answer -on the surface of the lenses, ensuring that the color density
is uniform throughout
Corning's sunsensors utilizes_____
Correct Answer -in-mass technology, which means that the photochromic
crystals are in the matrix of the material which distributes photochromic
molecules throughout the lens, allowing a consistent and effective light
response for the life of the lens
Factors influencing darkening/lightening of photochromic lenses
include_____
Correct Answer -(all the above) intensity of light, temperature , age of lens
UV filtering properties are inherent in which lens?
Correct Answer -(B & c) polycarbonate and trivex
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