Sources of Light Flashcards

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1
Q

What are Incandescent Lights?

A

The production of light as a result of a higher temperature. Very ineffective as only 5% - 10% of energy was converted to light in light bulbs, the rest being converted to heat.

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2
Q

What is Electric Discharge?

A

The process of creating light by passing an electric charge through a medium, typically a gas or vacuum. Lightning and Neon signs are examples of these.

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3
Q

What is Phosphorescent light?

A

The slow emission of light after absorption of Ultraviolet light. Phosphor is a material that absorbs Ultraviolet rays to emit light, examples including glow-in-the-dark objects.

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4
Q

What is fluorescent light?

A

The immediate emission of light after the absorption of ultraviolet light. This is 4-5x more efficient than incandescent light but contains mercury to produce the light. Examples include flourescent light bulbs

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4
Q

What is chemiluminescent light?

A

The direct production of light as a result of a chemical reaction with little or no heat produced, I.E glow sticks.

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5
Q

What is bioluminescent light?

A

The production of light through a living organism through a chemical reaction with little or no heat produced.

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6
Q

What is triboluminescent light?

A

The production of light due to crushing, scratching, or causing friction with an object. I.E., lifesavers.

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7
Q

What is Light-Emitting-Diodes light?

A

Light is produced as a result of electric current flowing in semiconductors. Very efficient and effective and is commonly used nowadays.

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