In a biprims experiment, the slite is illuminated by red light of wavelenght 6400. A.U. and the crosswire in the eypeice is adjusted to be at the centre of the `3^(rd)` bright band . By using blue light it is found that the `4^(th)` bright band is at the centre of the croswiere, find teh wavelength of blue light.A. 4800 A.U.B. 4500 A.U.C. 5800 A.U.D. 4600 A.U.

In a biprims experiment, the slite is illuminated by red light of wave

1.	In a biprims experiment, the slite is illuminated by red light of wavelenght 6400. A.U. and the crosswire in the eypeice is adjusted to be at the centre of the `3^(rd)` bright band . By using blue light it is found that the `4^(th)` bright band is at the centre of the croswiere, find teh wavelength of blue light.A. 4800 A.U.B. 4500 A.U.C. 5800 A.U.D. 4600 A.U.
Answer» Correct Answer - A For interence by thin films, the order of thickness of film is approximately equal to wavelenght of light , `i.e.,~~1(t=10000Å)`

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