Study page for science test pt.2 Flashcards
What is incandescent light?
Incandescent light is produced by heating a filament until it glows.
What is fluorescent light?
Fluorescent light is produced when an electric current excites mercury vapor, which then emits ultraviolet light that causes a coating inside the bulb to glow.
True or False: Incandescent bulbs are more energy-efficient than fluorescent bulbs.
False
Which type of light bulb typically lasts longer, incandescent or fluorescent?
Fluorescent
Fill in the blank: Incandescent bulbs produce light by __________.
heating a filament
What is one advantage of fluorescent lights over incandescent lights?
Fluorescent lights use less energy.
Multiple Choice: Which of the following is a common use for fluorescent lights? A) Streetlights B) Home lighting C) Decorative lamps
A) Streetlights
What gas is commonly used in fluorescent bulbs?
Mercury vapor
True or False: Incandescent bulbs emit a warm light.
True
What is the typical color temperature of incandescent light?
Around 2700K to 3000K
Fill in the blank: Fluorescent lights can produce a range of colors, including __________ and __________.
cool white, warm white
Which type of light is known for its harsh, bright light?
Fluorescent
Multiple Choice: Which type of bulb is generally cheaper to buy? A) Incandescent B) Fluorescent
A) Incandescent
What is the environmental concern associated with fluorescent lights?
They contain mercury, which is hazardous.
True or False: Both incandescent and fluorescent lights are used in residential homes.
True
What is the main reason fluorescent lights are considered more energy-efficient?
They convert more energy into light rather than heat.
Fill in the blank: The brightness of a light bulb is measured in __________.
lumens
Multiple Choice: Which type of bulb generally has a lower wattage for the same brightness? A) Incandescent B) Fluorescent
B) Fluorescent
What is one disadvantage of incandescent bulbs?
They have a shorter lifespan compared to fluorescent bulbs.
True or False: Incandescent lights are dimmable.
True
What does the term ‘lumen’ refer to?
A measure of the amount of light emitted by a source.
Fill in the blank: Fluorescent lights are often used in __________ lighting.
commercial
Which type of light is better for mood lighting?
Incandescent
What is the typical lifespan of an incandescent bulb?
About 1,000 hours
