In Fresnel’s biprism experiment, coherent sources are obtained from an incoherent source using division of(A) Amplitude(B) Wavefront(C) Phase(D) None

In Fresnel's biprism experiment, coherent sources are obtained from an incoherent source using the division of wavefront.
Explanation: The Fresnel biprism works by dividing a single wavefront from an incoherent light source (such as a distant point source) into two parts, each of which acts as a coherent source. These two wavefronts interfere with each other to produce an interference pattern. The method used to create these coherent sources is known as division of wavefront.
So, the correct answer is: (B) Wavefront.