Experiment Bi-prism of Fresnel

Subjects discussed :
- Study of non-localized interferences
- Determination of the angle at the top of the bi-prism
- Determination of the bi-prism index

Principles and objectives:
A Fresnel bi-prism is made up of two identical prisms joined together at the base and with the same very small angle B (around ten minutes). This offset gives rise to interference in the overlap zone between the two beams.
Measuring the interfringe allows us to find the angle at the top of the prism.

Composition :
▪ 1 prismatic bench of 1 m with set of adjustable feet (ref.202519)
 ▪ 3 standard prismatic carriers (ref.202234)
 ▪ 1 transverse prismatic carrier (ref.202392)
 ▪ 1 green laser 532 nm – 1 mW (ref.205157)
 ▪ 1 10x objective (ref.574031)
 ▪ 1 lens holder (ref.202456)
 ▪ 1 Fresnel bi-prism (ref.202666)
 ▪ 1 projection lens f+250 mm (ref.202278)
 ▪ 1 component holder Ø40 mm (ref.202241)
 ▪ 1 white, squared metal screen 20x20 cm (ref.202368)
 ▪ 1 experiment note