دو منشور فرنل با پایه نگهدارنده(Fresnel's biprism with holder)
Model 220201
Optic Experiments Equipment

Biprism according to Fresnel for the observation and quantitative investigation of interference through refraction
It has a rotatable holder
Dimensions of biprism : 30 mm × ۴۰ mm
Prism angle : 176˚ approx
Diameter of holder : 12 Cm
Stand rod length : 13 Cm×۸ mm