Unit 11: Refraction and Lenses Flashcards
what can be said about the speed of light in various media
the speed of light varies dependent upon the media
when is a light Ray bent towards the normal?
when light moves from a high speed to a low speed
if a ray moves from a low to high speed
it bends away from the normal
what doesn’t change about light when it goes from one medium to another
frequency
as the index of refraction gets larger, the speed of light through the material gets
slower
index of refraction of air
n=1.00
what happens to an underwater object as seen by an observer above it and why
it appears larger
the images is closer to the observer
a converging lens has a ___ focal length
positive
a diverging lens has a ___ focal length
negative
farsighted person
hyperopia
converging lens
nearsighted person
myopia
diverting lens
total internal reflection
complete reflection that takes place within a substance when the and of incidence of light striking the surface boundary is greater than the critical angle
critical angle
the and of incidence at which the refracted light makes a 90° angle with the normal
total internal reflection only occurs when
higher index of refraction to lower index of refraction
slow to fast light
dispersion
process of separating polychromatic light into its component wavelengths
what wavelength bends more through a given material
short wavelength
where must one be positioned to view a rainbow
between the sun and the rain
how do rays of sunlight behave in a raindrop
refracted at surface
reflected at back
refracted again out the front
for LENSES virtual images are located
in the front of the lens
refraction
bending of a wave front as the wave front passes between two substances in which the speed of the wave differs
