7 : In biprism experiment, the slit is illuminated by red light of wavelength 6400 A. U. and the cross wire of eyepiece is adjusted to the centre of 3rd bright band. By using blue light it is found that 4th bright band is at the centre of the cross wire. Find the wavelength of blue light.

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7 : In biprism experiment, the slit is
illuminated by red light of wavelength 6400 A.
U. and the cross wire of eyepiece is adjusted to
the centre of 3rd bright band. By using blue
light it is found that 4th bright band is at the
centre of the cross wire. Find the wavelength
of blue light.
Transcribed Image Text:7 : In biprism experiment, the slit is illuminated by red light of wavelength 6400 A. U. and the cross wire of eyepiece is adjusted to the centre of 3rd bright band. By using blue light it is found that 4th bright band is at the centre of the cross wire. Find the wavelength of blue light.
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