Chapter 7light Flashcards
(25 cards)
visible light
incandescant
reflection
parellel rays
diffuse reflection
light reflected in random directions off objects
light interacts with matter whar three ways
reflection, diffuse reflection, absorbtion
opaque
reflects light
transparent
transmitting light
incoming light is called
incident ray
the incident ray and reflected rays angles are related how?
same angle
perpendicular to point of reflection
the normal
flat mirrors produce what image
virtual
light rays originate from
a real image
in transparent medium light ray do what
refract
refraction depends on
incident angle and index of refraction
index of refraction
ratio of the speed of light in a vacuum to the speed of light in the medium
total internal reflection
refracted angle equals 90o
critical angle
limit to the angle of incidence
when are light rays reflected internally?
when the critical angle is 90+
spectrum
red to violet
what special property does a glass prism have?
dispersion
why does dispersion occur?
the index of refraction is different for each range of colors
interference
light passes through small slits or holes and produces and interference pattern of bright lines and dark zones
interference pattern
bright lines and dark zones
polarized light
virbrates in one direction only in a plane
what three ways can light be polarized?
by certain materials, by reflection or by scattering
