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light

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is the visible spectrum that is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), or 4.00 × 10−7 to 7.00 × 10−7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths). This wavelength means a frequency range of roughly 430–750 terahertz (THz). The main source of light on Earth is the Sun. Sunlight provides the energy that green plants use to create sugars mostly in the form of starches, which release energy into the living things that digest them. This process of photosynthesis provides virtually all the energy used by living things. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight. Some species of animals generate their own light, a process called bioluminescence.
Sunset. - Sunset in Masuria.
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Sunset.

Added 2 days ago by Zeta

97

Beautiful candles - Do it yourself, beautiful candles.
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Beautiful candles

Added 3 days ago by Jeżyna

13

A misty lake. - Lake clearance through trees.
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A misty lake.

Added 3 weeks ago by Zeta

63

Colorful watering cans. - Colorful watering cans on the wall.
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Colorful watering cans.

Added 3 weeks ago by Zeta

129

Prague Czech at night. - Czech Prague in the winter evening.
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Prague Czech at night.

Added 4 weeks ago by Zeta

45

Jigsaw puzzle - colorful jigsaw puzzle
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Jigsaw puzzle

Added month ago by andi

24

OLa dogs - this game is very nice
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OLa dogs

Added month ago by ania

0

Stopped in Time ... - Beauty and Delicate Ease of Moment
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Stopped in Time ...

Added 2 months ago by SU-

30

green hills - green hills, river, reflection of the sun
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green hills

Added 2 months ago by sandra

153

WINTER FOREST - winter, snow, forest, rays of the sun
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WINTER FOREST

Added 2 months ago by sandra

83

BAJKOWY VIEW - Leave, rest, relax
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BAJKOWY VIEW

Added 2 months ago by ada

64

The sun is shining. - The sun shines through the trees.
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The sun is shining.

Added 2 months ago by Zeta

41

Colorful puzzle - colorful jigsaw puzzle
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Colorful puzzle

Added 3 months ago by andi

44

ghfghjgjgjtuykuytkitu - cvbfghffgdfgrdfgredgredfgrtgdfrtefdgrtfdgfrtfgfrt
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ghfghjgjgjtuykuytkitu

Added 3 months ago by damiano

52

Baltic Sea - Bałtyk beach Dąbki
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Baltic Sea

Added 3 months ago by Ola

68

Ozobots in education - The use of ozobots in school
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Ozobots in education

Added 3 months ago by Ania

19

Jigsaw puzzle - colorful jigsaw puzzle
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Jigsaw puzzle

Added 3 months ago by andi

34

For the patient - complicated jigsaw puzzle
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For the patient

Added 3 months ago by andi

28 1

For the patient - complicated jigsaw puzzle
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For the patient

Added 3 months ago by andi

23

Jigsaw puzzle - colorful jigsaw puzzle
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Jigsaw puzzle

Added 3 months ago by andi

19

fjdjflkssl - klskx, s, XDL, dsllxnsxsklnvc; ass
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fjdjflkssl

Added 3 months ago by kot

81

asdfghjkd - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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asdfghjkd

Added 4 months ago by aaa

141

landscape - landscape landscape landscape landscape
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landscape

Added 4 months ago by ASK

170

Colorful puzzle - colorful jigsaw puzzle
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Colorful puzzle

Added 4 months ago by andi

16

La Sagrada Familia - Lorem ipsum dolor sit amet
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La Sagrada Familia

Added year ago by Ayla

53

footboard - footboard
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footboard

Added year ago by skill

24

Las Vegas 2 - Las Vegas USA
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Las Vegas 2

Added year ago by ASK

71

winter sun - sunny winter weather
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winter sun

Added year ago by Basiunia

226 1

women c.d - thoughtful girl and in the background a picture
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women c.d

Added year ago by stanisława

30

Colorful puzzle - colorful jigsaw puzzle
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Colorful puzzle

Added year ago by andi

28

Windows-10 - colorful jigsaw puzzle
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Windows-10

Added year ago by andi

19

Colorful puzzle - colorful jigsaw puzzle
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Colorful puzzle

Added year ago by andi

18

my own - wallpaper converted into a puzzle
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my own

Added year ago by Mayo

23

Sunset - colorful jigsaw puzzle
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Sunset

Added year ago by andi

184