waves Flashcards
how to get total internal refraction
if I is bigger than critical angle you get total internal reflection means no refraction
what happens if Incident ray equals critical angle
refraction occurs along the boundary
what happens if incident angle is less than critical angle
both reflection and refraction
equation for critical angle
sin c = incident angle/refractive index
what is refractive index
how much a medium alters the speed of light
what are convex (convering) lens
lens making parallel rays coverage principal focus e.g magnifying glass
concave (diverging) lens
lens makes parallel rays diverge (spread out) e.g in glasses
focal length
the distance between the center of a lens
and its point of focus
principal focus
the point where parallel rays meet after they pass through a lens
monochromatic
name for the light of a single frequency
how does a prism disperse light
prism sides not parallel , light refracted
- prism refracts each color by a different amount
- light splits into range of colors (spectrum)
color spectrum
order = red, orange, yellow, green, blue, indigo, violet
red light slowed down least - refracted least
violet light slowed
down most - refracted most
radio waves
broadcasting, communication
microwaves
satellite communication, cooking
infra-red
communication (remote controls), cooking
