Light Flashcards by Lauren Walker

Q

What is our primary source of light

A

The sun

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Q

Light travels in a ______ line

A

Straight

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Q

Light travels around how much km per second?

A

300,000 km

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Q

Electromagnetic spectrum order

A

Ultraviolet-> infrared-> visible

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Q

Shorter wavelength= ________ frequency

A

Higher

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Q

Longer wavelength= ________ frequency

A

Lower

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Q

What is electric discharge

A

A gas emits light when electrons pass through

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Q

Phosphorescence example

A

Glow in the dark stickers

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Q

Fluorescence example

A

Scorpion shell

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Q

What is chemiluminescence and an example

A

Break it -> releases energy, ex: glow sticks

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Q

What is bioluminescence and an example

A

Living organism, firefly

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Q

What is triboluminescence

A

Material is pulled apart, ripped, scratched, crushed, or rubbed

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Q

A luminous object produces?

A

Light

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Q

A non luminous object?

A

Reflects light

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Q

Transparent

A

Light passes through

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Q

Translucent

A

Some light passes through with light shadow

Q

Opaque

A

Blocks all light and casts dark shadow