4.4 Reflection flashcards

Light is a form of

energy that travels in waves.

Reflect is to

strike a surface and bounce back in the opposite direction.

When light hits a smooth surface, it is reflected at

the same angle that it hit the surface.

Shadows

The absence of light.

When light hits a rough surface, light waves are scattered

unevenly and travel in many directions and angles.

Transparent materials

let light pass through. Examples: glass, plastic wrap, water, air.

Translucent materials

partially let light pass through. Examples: wax paper, thin fabrics, thin paper.

Opaque materials

do not let light pass through. Examples: metal, wood, bricks.

Mirrors reflect

light.

Concave is curved

inward. Light passes through concave lenses and spreads apart. Objects look smaller.

Convex is curved

outward. Light passes through convex lenses and bends toward itself. Objects look bigger.

Light is reflected from any

surface