Light Flashcards
how is the normal line drawn
90 degrees to the surface
what is the name for a ray of light that hits a surface
incident ray
what is the name for the ray of light reflected from a surface
reflected ray
what is the rule for reflection
the incidence angle = relected angle
what is refraction
The change in direction of a light ray that happens when it travels from one transparent material to another
what is the critical angle of a material
the angle at which light stops being refracted and is reflected instead at a 90-degree angle
what 2 conditions and requirements for total internal reflection
the cladding myst gave a lower intensity than the core
the waves must meet the boundary at an angle greater than the critical angle
what are the 2 types of reflection
specular and diffuse
what is specular reflection
when waves are reflected on a smooth surface
what is diffuse reflection
occurs when teh surface is not smooth and is irregular, so the incident rays are reflected at many different angles
what is the longest colour wave
red
what is the shortest colour wave
violet
why does an object appear green
as the material absorbs all the others coming in and reflects only green
what is a lens
a lens is a piece of glass that bends light in
what are the 2 types of lenses
converging
diverging
