Which of the Following Types of Curing Lights Is Currently

question 25

Multiple Choice

Which of the following types of curing lights is currently the most popular?

• A) Halogen (quartz-tungsten-halogen, or QTH)
• B) Plasma arc (PAC)
• C) Laser (initially argon laser)
• D) Light-emitting diode (LED)

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Definitions:

Sound Waves

Sound waves are vibrations that travel through the air or another medium, which can be heard when they reach a person's or animal's ear, characterized by their frequency, wavelength, and amplitude.

Frequency

The rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light).

Pitch

Refers to the perceived frequency of a sound, determining how "high" or "low" it sounds.

Middle Ear

The air-filled space behind the eardrum that contains the tiny auditory bones responsible for transmitting sound from the outer ear to the inner ear.