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Lighting Essentials, Level I Lesson 2 Questions and Answers
Of all the technological advances over the past
century, nothing has completely altered our lives
as much as ? . - ANSWER -electric lighting
Until fairly recently, light was considered primarily
in terms of its ? . - ANSWER -quantity
Advances in our understanding of the ? that light
and color have on a wide range of human
emotions and activities have made the intelligent
use of these options increasingly important to the
success of any lighting installation. -
ANSWER -psychological impact
People in the lighting industry, who select lighting
sources and fixtures, often lack the complete
technical knowledge needed to make fully
informed decisions about their use. -
ANSWER -True
Consulting engineer and electrical contractors
understand the physical importance of color and
the impact that lighting can have on it but may be
unaware of the mechanics of the electrical
system design. - ANSWER -False
Visually perceived radiant energy is the simple
definition of light. - ANSWER -True
"Visible" light is just a small segment of the ? , a
broad range of radiant energy that also includes
X-rays, ultraviolet and infrared energy,
microwaves, and radio waves - ANSWER -
electromagnetic spectrum
Any form of electromagnetic energy, including
light, radiates outward from its source in straight
lines at ? (300,000 kilometers per second) and
dissipates as it gets further from its source. -
ANSWER -the speed of light
Light ? from objects to our eyes allows us to see -
ANSWER -reflected
Lighting can have a profound effect on people's ?
and how they respond to an environment. -
ANSWER -emotions
What wavelength are human eyes most sensitive
to? - ANSWER -~ 550 nm
There are two interconnected responses that
human eyes have to light: first, a reaction
(response) to the appearance of the light itself;
second, a reaction (response) to the effect the
light has on the color appearance of the objects
and surfaces - ANSWER -True
Light that features all of the visible wavelengths
in roughly equal amounts appears ? -
ANSWER -white
The ? primary colors can be mixed to create
almost any color of light. - ANSWER -3
We see the color of an object because the object
absorbs that color and reflects other colors -
ANSWER -False
A light source containing balanced quantities of ?
light can provide excellent color appearance even
if this light source is deficient in other colors of
the spectrum. - ANSWER -red, blue, and
green
