Fresnels Biprism Flashcards
1
Q
What’s fresnels biprism
A
It’s a device for obtaining coherent sources
2
Q
Base angles of a biprism are
A
Very small
3
Q
Fringe width from a biprism
A
Beta = wavelength x D/d
4
Q
Deviation in a biprism =
A
2a(n-1) x alpha
Where a is the distance of the source from the biprism
5
Q
In interference what is observed when the path difference between the interfering beams is 1.5lambda
A
A minima is observed
