FRSC 365 TEST 4 EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED
what is polarized light
light rays that vibrates parallel to each other
what are 2 key features of a microscope designed for polarized light microscopy
- the objective lenses are strain free to eliminate birefringence
- the stage can rotate
2 features of isotropic materials
- only 1 refractive index - disorganized molecular structure
2 features of anisotropic materials
- can have several refractive indices
- organized molecular structure
what is an example of an isotropic material
glass
what is an example of an anisotropic material
cotton
what will occur if polarized light passes through an isotropic material
it appears black
what is it called when polarized light passes through an anisotropic material
double refraction: light will split into 2 rays and will produce birefringence
what is birefringence
the numerical difference between 2 refractive indices
, how is birefringence calculated (2 equations)
r/1000xT or n2-n1
what is retardation
the distance between the fast and slow rays
what is extinction
when the optical axis of a material aligns with the direction the polarized light is vibrating
what effect will extinction have on a sample
the material will appear black
what is the thickness of a retardation plate
530 nm
what does a retardation plate do
determines sign of elongation
what does a compensator plate do and how does it do it
determines retardation by aligning slow and fast rays
what is the sign of elongation when the slow ray runs along a fiber
positive
what is the sign of elongation when the fast ray runs along a fiber
negative
when using the retardation plate, if the intensity of the fiber increases, what is the
sign of elongation
negative
when using the retardation plate, if the intensity of the fiber decreases, what is
the sign of elongation
WITH COMPLETE SOLUTIONS VERIFIED
what is polarized light
light rays that vibrates parallel to each other
what are 2 key features of a microscope designed for polarized light microscopy
- the objective lenses are strain free to eliminate birefringence
- the stage can rotate
2 features of isotropic materials
- only 1 refractive index - disorganized molecular structure
2 features of anisotropic materials
- can have several refractive indices
- organized molecular structure
what is an example of an isotropic material
glass
what is an example of an anisotropic material
cotton
what will occur if polarized light passes through an isotropic material
it appears black
what is it called when polarized light passes through an anisotropic material
double refraction: light will split into 2 rays and will produce birefringence
what is birefringence
the numerical difference between 2 refractive indices
, how is birefringence calculated (2 equations)
r/1000xT or n2-n1
what is retardation
the distance between the fast and slow rays
what is extinction
when the optical axis of a material aligns with the direction the polarized light is vibrating
what effect will extinction have on a sample
the material will appear black
what is the thickness of a retardation plate
530 nm
what does a retardation plate do
determines sign of elongation
what does a compensator plate do and how does it do it
determines retardation by aligning slow and fast rays
what is the sign of elongation when the slow ray runs along a fiber
positive
what is the sign of elongation when the fast ray runs along a fiber
negative
when using the retardation plate, if the intensity of the fiber increases, what is the
sign of elongation
negative
when using the retardation plate, if the intensity of the fiber decreases, what is
the sign of elongation
