Laws of reflection Flashcards
What are the laws of something being transparent?
Materials that allow light to pass through are usually clear substances like air, water, window glass, and lenses of our eyes as well.
what are the laws of something being translucent?
Materials that cause light to scatter and bend the rays of light, while some rays bounce back off the materials. Examples: stained glass, plastic, and sunglasses.
What are the rules for something to be opaque?
Materials that completely block light rays from passing through, tense materials will cast shadows. Examples: books, desks, vehicles, and skeletons.
What is reflection?
Light bounces off an object. The light will then reflect at the same angle as it hits the surface. Properties of reflection include a shiny, glass-like, or polished medal.
Laws of reflection
When a ray of light hits a surface, it bounces in a certain way. the incoming angle is always equal to the angle leaving the surface.
What is Refraction?
When light bends as it passes through one medium to another. The bending is caused by the change in density of the medium. A more dense medium will speed the light up.
How do you measure refraction?
A vaccum is not very dense and a diamond is very dense.
The refractive index of material is a number that describes how fast the light travels through the material.
What is absorption of light?
Light waves can be absorbed by the object, in which case its energy is converted to heat.
Examples of reflection, colour and absorption
Black pigments absorb all wave lengths of light. White pigments reflect most wavelengths of light. Green pigments only reflect green wavelengths of light.
