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How Do Light Bulbs Work? | Earth Lab

290,061 views

BBC Earth Lab

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (UK)

Speech Time:

94%
  • 4:03 / 4:17

Speech Rate:

  • 166 wpm - Fast

Category:

  • Entertainment

Tags :

Intro:

Video Vocabulary

pioneers

/ˌpīəˈnir/

noun other verb

first person to explore new territory. People exploring new places or fields of endeavor. To begin or discover something new.

minutes

/ˈminit/

noun other

sixty seconds. Units of time equal to 60 seconds.

usually

/ˈyo͞oZH(o͞o)əlē/

adverb

under normal conditions.

chemical

/ˈkemək(ə)l/

adjective noun

Made of various elements. Basic substance produced by mixing elements.

through

/THro͞o/

adjective adverb preposition

continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. moving in one side and out of other side of.

mechanically

/məˈkanək(ə)lē/

adjective adverb

In a machine-like manner; without feeling. By or like the use of machines; automatically.

photons

/ˈfōtän/

noun other

particle representing quantum of light or other electromagnetic radiation. Quantum of electromagnetic radiation.

glowing

/ˈɡlōiNG/

adjective verb

expressing great praise. To look very healthy and contented.

reaction

/rēˈakSH(ə)n/

noun

Bodily response to a drug or something eaten.

electricity

/əˌlekˈtrisədē/

noun

Energy generated positive and negative charges.

melting

/ˈmeltiNG/

adjective noun verb

becoming liquefied by heat. action of liquefying. To become liquid through heating.

electrical

/əˈlektrək(ə)l/

adjective

Related or connected to electricity.

realise

/ˈrē(ə)ˌlīz/

verb

become fully aware of something as fact.

changed

/CHānj/

verb

To exchange one kind of money for another.

although

/ôlˈT͟Hō/

conjunction

in spite of fact that.

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