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Question
In fresnel's biprism experiment, coherent sources are obtained from an incoherent source using division of
In fresnel's biprism experiment, coherent sources are obtained from an incoherent source using division of
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Solution
The correct option is B Wavefront
The light emerging from the slit fall on the biprism. The edge A of the
biprism divides the incident wave front into two parts. One is through
upper half AB of biprism and appears to coming from virtual source S1. Other is from lower half AC of biprism and appears to coming virtual S2 The interference fringes are seen in the overlapping region XY and can be seen by eyepiece.
Thus the incident wave's amplitude is divided to get two virtual sources as shown in the figure.
The light emerging from the slit fall on the biprism. The edge A of the biprism divides the incident wave front into two parts. One is through upper half AB of biprism and appears to coming from virtual source S1. Other is from lower half AC of biprism and appears to coming virtual S2 The interference fringes are seen in the overlapping region XY and can be seen by eyepiece.
Thus the incident wave's amplitude is divided to get two virtual sources as shown in the figure.
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