Thames & Kosmos Wow in the World: Light-Up Terrarium handleiding

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Thames & Kosmos

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Handleiding

“You, me,

and UV!”

The

sun

emits

invisible

light

in addition to visible

light. In a

rainbow,

you see the

colors that are visible to the naked eye. Each

end of the rainbow is

bordered by light that

our eyes caot s!

There is an infrared range

that borders

red light

as well as an ultraviolet

range that borders

violet light.

UV LED

SUPER STRONG SUPER STRONG

INVISIBLE LIGHTINVISIBLE LIGHT

Infrared range

Wave-

length

700 nm

400 nm

500 nm

600 nm

Ultraviolet range

Range of light visible to humans

Ultraviolet light (or UV light for short) has some

astonishing properties. It has a

higher energy

and a

shorter wavelength

than visible light, which means it

behaves differently than visible light in many ways. For

example, it has a much

stronger eect on photographic

film

than visible light (which is how it was discovered in the

rst place), it

tans the skin,

and it produces fluorescence

(a glowing eect)

in many things.

Strong ultraviolet light from the sun is very useful in

nature. Unlike humans,

many bird species, honeybs,

and bumblebs can s UV light.

That is why a lot of

owers (such as dandelions and orchids) have patterns

that are only visible to humans under UV light, and that are

invisible

to the human eye normally.

The string lights in this kit are LEDs (light-emiing diodes) that emit

weak UV light

, which causes some of the materials in the terrarium

to glow. Continue reading on the next page to learn more.

UV light reflected

from ORCHIDS

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