We could use mirrors to manipulate light waves… A flat mirror is a smooth shiny surface that reflects light. Light travels in a straight line as it is reflected from a surface. –The incident ray is the light ray that strikes the surface. –The reflection ray is the light ray that reflects off the surface. –The Law of Reflection states that the angle of reflection equals the angle of incidence.
REFLECTION Bouncing a ray or wave off a surface
REFRACTION is the bending of a wave or light by the change in density of the medium
Using lenses to bend light Images in convex Images in concave mirrors are always mirrors are always smaller. bigger.
Just a few more terms to review… Interference - the superposition of two or more waves resulting in a new wave pattern superpositionwaves Diffraction - the bending and spreading of waves when they meet an obstruction.waves
Special things to know about sound… cannot travel through empty space or a vacuum. Sound travels faster through solids than through liquids or gases. When temperature increases, the speed of sound increases. When the air becomes more humid, the speed of sound increases.