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LIGHT
Light is radiated by charged particles that are moving. It is a visible form of energy to the human eye. Plants need light to grow. They use a process called photosynthesis. Light can behave like a wave sometimes and then like a |
The building blocks of matter are atoms. The electron atom gives forth light...
Read more about light....
SOUND
Sound in a very simple way is the vibrating of any surface. We can hear sound when it has frequencies between 15 and 20 thousand hertz. Ultrasonic sounds are higher than 20,000 herts. Sound is a field of physics. Sound helps us hear.
A sound wave consists of two parts; the rarefactions and the condensations. Sound is
around us all the time.
A sound wave is the vibration of sound moving throughout the air. The pitch of a sound
wave dertermens the loudness of a sound.
Read more about sound....