The number of revolutions per second around a circle is called the motion.

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Which basic property determines a colored light's placement on the spectrum of visible light? a. speed b. frequency c. amplitude d. velocity