question_answer

A plane light wavelength\[\lambda =0.70\mu m\] falls normally on the base of a biprism made of glass \[(n=1.520)\] with refracting angle\[\theta =5.0{}^\circ \]. Behind the biprism, there is a plane parallel plate, with the space between them filled up with benzene\[(n'=1.500)\]. The width of a fringe on the screen placed behind this system is \[\frac{a}{10}\]then find the value of a is

Answer:

2.00