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Posts tagged light

April 8, 2011

 

candle_snuffer

Snuff: How Candle-Snuffers Work

Why doesn't the flame just continue to burn underneath the bell, no matter how flat you crush it? The answer is air.

April 6, 2011

 

statue staring at the sun

Why Do I Sometimes See Tiny Moving Dots?

Those tiny dots are actually blood cells moving in the retina of your eye.

March 21, 2011

 

leaves competing for sunlight

Green Plants Can Sense Future Competition For Sun

Scientists have found evidence that plants can sense the presence of neighbors that might cast shadows on them at some future time.

January 21, 2011

 

A blackhole in space

What Is A Black Hole?

Black holes were always the most dangerous thing when traveling through space in science fiction shows. What are black holes and how do they form?

January 18, 2011

 

light lines created by a flashlight

How To Calculate The Speed Of Light

Learn how Ole Roemer learned that light does take time to travel.

January 13, 2011

 

A telescope set up outside

Venus Glows In The Dark!

Venus may appear to glow under moonlight but the planet also glows in infrared light.

November 19, 2010

 

a city with the moon above it

The Dark Side Of The Moon Does Not Exist!

There is no place on the moon that is completely dark. Learn why!

November 12, 2010

 

Corner of a room

Visual Systems, Binocular Vision, And Wall Color

Why does the corner of the room, where two walls and the ceiling meet seem to show two different wall colors?

November 9, 2010

 

Solar panel square

Nanotubes, Solar Cells, And Renewable Energy

Solar panels can only capture so much sunlight and produce a limited amount of electricity. What are the other options for sustainable energy?

October 25, 2010

 

A spider web wrapped around a pink flower

Spiders Send Ultraviolet Signals to Insects

Spiders have been found to decorate their webs with special ultraviolet-reflecting silk in flower-like patterns.

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