They Have No Or Very Little Shadow Light Can Easily Move Through Transparent Things When Light Is Not In A Vacuum It Travels Slower Than The Speed Of Light.
The Shorter The Wavelength The More Energy The Light Has The Speed Of Light Does Not Depend On Its Energy Going Through Translucent Objects Can Slow Light Down By A Very Small Amount.
Light And Color Are Forms Of Analog Information However Electronic Cameras And Computer Displays Work With Digital Information Electronic Cameras Or Document Scanners Make A Digital.
Other Colors Can Be Seen Only With Special Cameras Or Instruments: Wavelengths Up The Frequency Of Red Are Called Infrared And Higher Than Of Violet Are Called Ultraviolet.
Radio Waves Are A Form Of Electromagnetic Radiation With A Wavelength Longer Than Infrared Light The Microwaves That Are Used To Heat Food In A Microwave Oven Are Also A Form Of Electromagnetic Radiation.
Light Makes Up A Part Of Both The Electromagnetic Spectrum And Radiation Given Off By Stars Like The Sun The Light That Comes From The Sun Reaches The Earth And Makes It Bright.