3C.2 Total internal reflection Flashcards
1
Q
what is the critical angle
A
the largest angle of incidence that a ray in a more dense medium can have while still emerging into the less dense medium
2
Q
what is Total internal reflection
A
waves that are reflected back into the same medium at a boundary between two media
3
Q
what are the two conditions that must be met in order for us to have a total internal reflection
A
- the wave needs to emerge from a more dense medium
2. the angle of the ray to the normal is more than the critical angle
4
Q
the qr = qc when
A
the critical angle is reached
5
Q
the qr > qc when
A
total internal reflection is reached
6
Q
the qr < qc when
A
before critical angle is reached
7
Q
what is the critical angle equation that can be derived from snell’s law
A
sin c =n1/n2
8
Q
what can TIR be used in
A
periscope, endoscope, optical fibers
