#1
Which of the following is an example of a natural light source?
Sun
ExplanationSun is a celestial body emitting light naturally.
#2
What type of light source uses a filament that glows when electricity passes through it?
Incandescent light
ExplanationIncandescent lights utilize glowing filaments powered by electricity.
#3
Which of the following is NOT a characteristic of incandescent lights?
They have a long lifespan
ExplanationIncandescent lights have a relatively short lifespan.
#4
Which of the following light sources is characterized by its ability to instantly turn on to full brightness?
LED light
ExplanationLED lights can instantly achieve full brightness upon activation.
#5
Which of the following is a characteristic of incandescent light bulbs?
They produce light by passing electricity through a filament
ExplanationIncandescent bulbs produce light by passing electricity through a filament, causing it to glow.
#6
Which of the following is NOT a characteristic of LED lights?
Heat emission
ExplanationLED lights emit minimal heat.
#7
What is the primary difference between CFLs (Compact Fluorescent Lights) and incandescent bulbs?
CFLs produce less heat
ExplanationCFLs generate less heat compared to incandescent bulbs.
#8
Which of the following light sources produces light by passing electricity through a gas?
Fluorescent light
ExplanationFluorescent lights produce light through electrically stimulated gas.
#9
What is the primary advantage of halogen lights over incandescent lights?
Higher color rendering index
ExplanationHalogen lights have a higher Color Rendering Index (CRI) than incandescent lights.
#10
Which of the following light sources is known for its ability to produce a focused beam of light?
Halogen light
ExplanationHalogen lights are capable of producing focused beams of light.
#11
In terms of color rendering, which type of light source typically offers the best performance?
Halogen lights
ExplanationHalogen lights offer superior color rendering.
#12
Which of the following is a characteristic of fluorescent lights?
They emit UV radiation
ExplanationFluorescent lights emit UV radiation as part of their operation.
#13
What type of light source is commonly used in automotive headlights for its high brightness and efficiency?
LED light
ExplanationLED lights are often used in automotive headlights due to their brightness and efficiency.
#14
Which of the following types of light sources is most commonly used for underwater illumination?
LED light
ExplanationLED lights are frequently used for underwater illumination due to their efficiency.
#15
What is the primary drawback of using incandescent lights compared to other types of light sources?
High energy consumption
ExplanationIncandescent lights consume a significant amount of energy.