| 释义 |
ˈbiprism
[bi-2.]
A glass prism with a refracting angle of nearly 180 degrees, used in observing the interference of light.
1884A. Daniell Princ. Physics 486 Such a beam may be divided in two parts..by refraction through a biprism. 1890T. Preston Th. Light 119 Fresnel's Bi-prism... Let CDE represent a glass prism with a very obtuse angle E... The whole prism is as if made up of two prisms CE and DE of very small angle (at C and D) placed base to base at E, and hence the name bi-prism. 1904A. Schuster Th. Optics iv. 60 (heading) Fresnel's Biprism. |