2.5 - Polarisation Flashcards
1
Q
what is meant by unpolarised light
A
the electric field vector of light from a source oscillates in many planes
2
Q
what is meant by polarised light
A
the electric field vector of light from a source oscillates in only 1 plane
3
Q
what does a polariser do
A
a polariser converts unpolarised light into polarised light
4
Q
what does an analyser do
A
an analyser is used to examine whether light is polarised or not
5
Q
what is brewster’s angle also known as
A
polarisation angle
6
Q
explain brewsters angle
A
light which reflects off an electrical insulator at Brewster’s angle (n=tanip), is completely plane polarised.
