2025/2026 Exam Questions and Answers
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Incident Meter - 🧠 ANSWER ✔✔Measures light coming directly from a source
such as a light bulb, projector, or monitor
Reflected/Spot Meter - 🧠 ANSWER ✔✔Measures the light that bounces off of an
object like a projection screen or work surface. These types of meters can also be
used to measure the light emitting from a monitor, rear projection screen, or LED
sign. An AV professional can use spot measurements and total surface area to
calculate the proper lamp size required for a specific task.
Foot-Candles - 🧠 ANSWER ✔✔A measurement of the light falling on an
incidental light meter at a given distance from the source
Lumen - 🧠 ANSWER ✔✔Is a measure of the light quantity emitted from a constant
light source across one square meter
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, Foot-Candle (fc) - 🧠 ANSWER ✔✔English unit of measurement expressing the
intensity of light illuminating an object. The illumination from one candle falling
on a surface of 1 square foot at a distance of 1 foot.
Lux - 🧠 ANSWER ✔✔Is a contraction of the words luminance and flux; 10.7 lux is
equal to 1 footcandle
Standards for Lumen measurement - 🧠 ANSWER ✔✔ANSI/NAPM IT7.228-1997
(ret. 2003)
ANSI/PIMA IT7.227-1998 (ret. 2003)
Now maintained in:
IEC 61947-1 and 61947-2
Candela per Meter Squared (cd/m²) - 🧠 ANSWER ✔✔measurement of light
reflected off a screen, the value of which depends upon the intensity of the light
and screen gain
Candela - 🧠 ANSWER ✔✔measures luminance, is the luminous intensity of a
source that emits monochromatic radiation of frequency 540 × 1012 hertz, and has
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED