Module 6 Flashcards
The bending of light as it
passes obliquely from one
optical medium to another of
different refractive index.
REFRACTION
The optical media must have
__refractive indices.
different
The light must strike the
surface
obliquely
The ratio of the velocity
of light in a given pair of
media
INDEX OF REFRACTION
The ratio of the velocity of
light in vacuum to the
velocity of light in another
medium.
ABSOLUTE
REFRACTIVE INDEX
The ratio of the velocity of light in the
first medium to the velocity of light
in the second medium.
RELATIVE
REFRACTIVE INDEX
The incident ray and the refracted
ray lie in one plane at the point of
__ but on the opposite sides of
the normal to the surface.
incidence
A constant ratio exists between the
sines of the angles of incidence and
refraction.
LAW # 2 SNELL’s LAW
(Willebrord Snell)
A ray of light passing obliquely from
a rarer medium to a denser medium is
bent __ the normal to the
surface.
towards
A ray of light passing obliquely from
a denser medium to a rarer medium is
bent__ from the normal to the
surface.
away
A ray of light striking the surface
perpendicularly is __
UNDEVIATED
An optical medium with
parallel – sided interfaces. (RECTANGULAR)
PLANE REFRACTOR
the sideway displacement
of light ray after passing
through a plane refractor.
LATERAL DISPLACEMENT
The distance by which the
object is apparently moved
towards or away from the
interface when the object
being viewed is located in
another medium.
APPARENT / LINEAR
DISPLACEMENT
An angle of incidence at
the denser medium that yields
an angle of refraction of 90 ̊
CRITICAL ANGLE
An optical phenomenon that
occurs if a ray of light is incident
on a surface separating an
optically dense from a less
optically dense medium at an
angle of incidence that is
considerably large.
TOTAL INTERNAL
REFLECTION
an image formed by the reflection of
light at layers of air of different
temperature (ILLUSION)
MIRAGE
seen over the
land
Inferior Mirage
occasionally seen over the sea
Superior Mirage / Looming
Technology of channeled
light transmission through
hair-like strand pure glass
known as optical fibers or
LIGHT PIPE.
FIBER OPTICS
The procedure used by
medical doctors to examine
the internal organs of the
body.
ENDOSCOPY
An optical device used in land
and in sea warfare, submarine
navigation, and elsewhere to
enable an observer see his
surroundings while remaining
under cover, behind armour, or
submerged in water.
PERISCOPE
the boundary between two optical media.
Interface
the light ray that is directed towards the surface
Incident Ray
the point where the incident ray hits the interface.
Point of Incidence
an imaginary line that passes thru the point of incidence and perpendicular to the interface.
Normal to the Surface
the angle formed by the incident ray with the normal to the surface.
Angle of Incidence
the light ray that leaves the surface, can be bent either towards or away from the surface.
Refracted Ray
the angle formed by the incident ray with the normal to the surface.
Angle of Refraction
