4.2 Light Energy flashcards

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Last updated 12:14 PM on 6/13/26
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19 Terms

1
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Light is

Visible waves of electromagnetic energy

<p>Visible waves of electromagnetic energy</p>
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Electromagnetic Spectrum

Range of frequencies of electromagnetic waves, including visible light

<p>Range of frequencies of electromagnetic waves, including visible light</p>
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Crest

Highest point of a wave

<p>Highest point of a wave</p>
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Wavelength

Distance between wave peaks or troughs, described by frequency and energy

<p>Distance between wave peaks or troughs, described by frequency and energy</p>
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Frequency

Number of waves passing a point in one second

<p>Number of waves passing a point in one second</p>
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Gamma Rays

High-energy electromagnetic waves with high frequency

<p>High-energy electromagnetic waves with high frequency</p>
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Radio Waves

Low-energy electromagnetic waves with low frequency

<p>Low-energy electromagnetic waves with low frequency</p>
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Visible Light

Spectrum of colors from red to violet, each with specific wavelength

<p>Spectrum of colors from red to violet, each with specific wavelength</p>
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Light does not need a ___________ to travel through.

medium

<p>medium</p>
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Speed of Light

Constant speed of light in a vacuum: 300,000 km/s

<p>Constant speed of light in a vacuum: 300,000 km/s</p>
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Transformation of Energy

Process where light energy is converted into other forms, like solar to electricity

<p>Process where light energy is converted into other forms, like solar to electricity</p>
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What emits, reflects, or transmits light?

Everything

<p>Everything</p>
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Emits means to

send out

<p>send out</p>
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The sun emits what?

electromagnetic radiation

<p>electromagnetic radiation</p>
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Does heat or light travel through space?

light

<p>light</p>
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In what form/pattern does electromagnetic radiation travel?

waves

<p>waves</p>
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Waves are described by what two things?

length of one wave; number of waves that pass a point in one second

<p>length of one wave; number of waves that pass a point in one second</p>
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Light can travel in empty space called a

vacuum

<p>vacuum</p>
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When in space, light travels in what type of lines?

straight

<p>straight</p>