Unlike a sound waves, light waves do not need a medium ... Light travels in a straight line. When drawing a light ray: Use a ruler and a sharp pencil to draw a straight line.

which can then be decoded when the wave is received. Television and radio systems use this principle to broadcast information. Infrared light is used by electrical heaters, cookers for cooking ...

In learning about the parts of a wave, students will learn about wavelength and use their understanding to observe how visible light can be measured. This standard emphasizes student understanding of ...

LIDAR (light detection and ranging) equipment, which uses light waves rather than radio waves, can detect CAT up to about 15 miles ahead, Williams says. But LIDAR instruments are not yet available ...

OCT uses light waves to scan tissue and create a 3D image, similar to the way ultrasound creates images from sound waves.

Instead, it pulls power from ambient light and radio waves. Follow Tech Insider: On Facebook More from Tech Researchers at the University of Washington have created a cell phone that uses so ...