6.8 Review Questions 1. Balanced spectral composition of artificial white light is critical for correct color reproduction. It is characterized by the color rendering index, which shall be: a) 40% is enough b) good (75%) c) very good (more than 85%) d) A and C are the correct 2. To ensure proper results of the visual testing (to ensure sensitivity) it shall be taken into account: e) using of appropriate light intensity of the test surface respecting the surface reflectance f) optimization of light source color temperature g) optimal direction of the light in relation to the direction of observation h) A, B and C are correct 3. Illumination intensity is variable: a) related to observed surface b) related to spreading of the light in space c) related to property of the light source d) expression of probability of finding of quality surface 4. Color temperature of light: a) is measured in °C b) represents the physical temperature of the sources c) characterize the coloring of light d) A and B are correct 5. For searching for the fine details on the surface, should be used: a) diffuse lighting b) focused light c) unfocused light d) A and C can be correct 6. What kind of photometer is less appropriate for practical use in VT? a) visual b) with digital display of measured values e) equipped with spectral filter d) luxmeter 7. What statement is true for color rendering index? a) It indicates the degree of faithfulness of color rendering when observed under a given lighting b) Have to be very high (above 85%) e) differences disappear between colors if it is small d) A, B and C are correct Continuity of emitted spectrum affects: a) color rendering b) eye fatigue c) result of visual inspection d) all above is correct 9. What units are used to measure illumination intensity? a) candela [cd] b) lux [lx] c) foot-candle [fc] d) B and C are correct 10. Surface is illuminated by a point source of luminosity 100 Cd from the distance of Im. How can we increase the intensity of surface illumination? a) bringing the source closer to the surface (at a distance of 0,8 m) b) focusing of lighting (use parabolic mirrors around a spot source) using source with higher luminous intensity c) d) A, B and C are correct
6.8 Review Questions 1. Balanced spectral composition of artificial white light is critical for correct color reproduction. It is characterized by the color rendering index, which shall be: a) 40% is enough b) good (75%) c) very good (more than 85%) d) A and C are the correct 2. To ensure proper results of the visual testing (to ensure sensitivity) it shall be taken into account: e) using of appropriate light intensity of the test surface respecting the surface reflectance f) optimization of light source color temperature g) optimal direction of the light in relation to the direction of observation h) A, B and C are correct 3. Illumination intensity is variable: a) related to observed surface b) related to spreading of the light in space c) related to property of the light source d) expression of probability of finding of quality surface 4. Color temperature of light: a) is measured in °C b) represents the physical temperature of the sources c) characterize the coloring of light d) A and B are correct 5. For searching for the fine details on the surface, should be used: a) diffuse lighting b) focused light c) unfocused light d) A and C can be correct 6. What kind of photometer is less appropriate for practical use in VT? a) visual b) with digital display of measured values e) equipped with spectral filter d) luxmeter 7. What statement is true for color rendering index? a) It indicates the degree of faithfulness of color rendering when observed under a given lighting b) Have to be very high (above 85%) e) differences disappear between colors if it is small d) A, B and C are correct Continuity of emitted spectrum affects: a) color rendering b) eye fatigue c) result of visual inspection d) all above is correct 9. What units are used to measure illumination intensity? a) candela [cd] b) lux [lx] c) foot-candle [fc] d) B and C are correct 10. Surface is illuminated by a point source of luminosity 100 Cd from the distance of Im. How can we increase the intensity of surface illumination? a) bringing the source closer to the surface (at a distance of 0,8 m) b) focusing of lighting (use parabolic mirrors around a spot source) using source with higher luminous intensity c) d) A, B and C are correct
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
![6.8 Review Questions
1. Balanced spectral composition of artificial
white light is critical for correct color
reproduction. It is characterized by the color
rendering index, which shall be:
a) 40% is enough
b) good (75%)
c) very good (more than 85%)
d) A and C are the correct
2. To ensure proper results of the visual testing
(to ensure sensitivity) it shall be taken into
account:
e) using of appropriate light intensity of the
test surface respecting the surface
reflectance
f) optimization of light source color
temperature
g) optimal direction of the light in relation
to the direction of observation
h) A, B and C are correct
3. Illumination intensity is variable:
a) related to observed surface
b) related to spreading of the light in space
c) related to property of the light source
d) expression of probability of finding of
quality surface
4. Color temperature of light:
a) is measured in °C
b) represents the physical temperature of the
sources
c) characterize the coloring of light
d) A and B are correct
5. For searching for the fine details on the
surface, should be used:
a) diffuse lighting
b) focused light
c) unfocused light
d) A and C can be correct
6. What kind of photometer is less appropriate
for practical use in VT?
a) visual
b) with digital display of measured values
e) equipped with spectral filter
d) luxmeter
7. What statement is true for color rendering
index?
a) It indicates the degree of faithfulness of
color rendering when observed under
given lighting
a
b) Have to be very high (above 85%)
e) differences disappear between colors if it
is small
d) A, B and C are correct
8. Continuity of emitted spectrum affects:
a) color rendering
b) eye fatigue
c)
result of visual inspection
d) all above is correct
9. What units are used to measure illumination
intensity?
a) candela [cd]
b) lux [lx]
c) foot-candle [fc]
d) B and C are correct
10. Surface is illuminated by a point source of
luminosity 100 Cd from the distance of 1m.
How can we increase the intensity of surface
illumination?
a)
bringing the source closer to the surface
(at a distance of 0,8 m)
b)
focusing of lighting (use parabolic
mirrors around a spot source)
c)
using source with higher luminous
intensity
d) A, B and C are correct](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff674b3bc-0b59-4961-aa09-963bc91eeaee%2Fc5eccb36-5bc7-446c-b5d5-1578c934e1fc%2Ffkvh3tk_processed.jpeg&w=3840&q=75)
Transcribed Image Text:6.8 Review Questions
1. Balanced spectral composition of artificial
white light is critical for correct color
reproduction. It is characterized by the color
rendering index, which shall be:
a) 40% is enough
b) good (75%)
c) very good (more than 85%)
d) A and C are the correct
2. To ensure proper results of the visual testing
(to ensure sensitivity) it shall be taken into
account:
e) using of appropriate light intensity of the
test surface respecting the surface
reflectance
f) optimization of light source color
temperature
g) optimal direction of the light in relation
to the direction of observation
h) A, B and C are correct
3. Illumination intensity is variable:
a) related to observed surface
b) related to spreading of the light in space
c) related to property of the light source
d) expression of probability of finding of
quality surface
4. Color temperature of light:
a) is measured in °C
b) represents the physical temperature of the
sources
c) characterize the coloring of light
d) A and B are correct
5. For searching for the fine details on the
surface, should be used:
a) diffuse lighting
b) focused light
c) unfocused light
d) A and C can be correct
6. What kind of photometer is less appropriate
for practical use in VT?
a) visual
b) with digital display of measured values
e) equipped with spectral filter
d) luxmeter
7. What statement is true for color rendering
index?
a) It indicates the degree of faithfulness of
color rendering when observed under
given lighting
a
b) Have to be very high (above 85%)
e) differences disappear between colors if it
is small
d) A, B and C are correct
8. Continuity of emitted spectrum affects:
a) color rendering
b) eye fatigue
c)
result of visual inspection
d) all above is correct
9. What units are used to measure illumination
intensity?
a) candela [cd]
b) lux [lx]
c) foot-candle [fc]
d) B and C are correct
10. Surface is illuminated by a point source of
luminosity 100 Cd from the distance of 1m.
How can we increase the intensity of surface
illumination?
a)
bringing the source closer to the surface
(at a distance of 0,8 m)
b)
focusing of lighting (use parabolic
mirrors around a spot source)
c)
using source with higher luminous
intensity
d) A, B and C are correct
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