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.
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.