fresnel & diffraction
DESCRIPTION
hereu can got the view of finding the wavelength of sodiun by using fresnel biprism nd also the width of wire by diffraction methodTRANSCRIPT
Trisha Banerjee @ 2010
Slit ( source)
Biprism ( two virtual souse)
Stand for lens
Optical bench
Whole setup foe deterring the wavelength of sodium ligh by Fresnel's biprism
Trisha Banerjee @ 2010 2010
Whole setup for determining the diameter of wire by using difrraction in shadow region phenomenon:-
sourceslit
Stand for wire
Screen or eyepiece
Trisha Banerjee @ 2010
Screw to setup the slit axis ( i.e. parallel to wire)
Slit opening
Screw to adjust the width of the slit
Screw to adjust the height of the slit
SLIT:-
Trisha Banerjee @ 2010
Screw to adjust the axis of Biprism
Screw to inset the Biprism properly
Biprism
Screw to adjust the height of the biprism
Tangent screw (to remove the lateral shift of the fringe pattern).
Biprismstand:-
Trisha Banerjee @ 2010
Screw to adjust the axis of the wire
Wire to measure the diameterScrew to fit the wire stand
Optical bench
Tangent screw.
Wire Stand:-
Trisha Banerjee @ 2010
Micrometer reading
Screw to rotate the micrometer
Ramsden’s eyepiece( screen to see the fringes)
Main scale reading
Screw to adjust the upright position of screen.
Screen:-
Trisha Banerjee @ 2010
To remove the bench error:-
slit Measuring rod
stand
Trisha Banerjee @ 2010
How to remove the bench error:-
first of all measure the length of rod by optical bench and by scale both.
scale measure the actual length and optical bench measure the apparent one.
then find the error.
Precautions:-
Always first remove the lateral shift then onwards perform the experiment.
Trisha Banerjee @ 2010