supply of melde s string experiment and photoelectric supply of melde s string experiment and photoelectric , supply of melde’s string experiment and photoelectric , meldes string experiment- complete setup a ) meldes apparatusmake : bestocat no : i. 1147 ( osaw pattern ) b ) battery eliminators make : bestocat no : 1919 ( c ) c ) physical weight box: brass. with fractional weight & forcep. range : 1mg to 200 gms ( make : sh ) d ) measuring tape ( please refer nit document for complete specifications ) , photo electric setup - complete setup make : besto cat no : 2017 • instrument for studying the photo electric effect - to obtain the plancks constant. • a halogen source provides light energy to the photo tube. • a filter wheel is placed in between the light source and photo tube to select different wavelengths. • the filter wheel includes five narrow band interference filters to get the precise wavelength. • a vacuum photo tube is kept inside the tube housing. this tube has very low anode dark current to achieve better results. • the microprocessor controlled electronic interface gives the current and voltage readouts. the ammeter gives accurate current output measurement facility. toggle switch is provided to change the current range. • the regulated power supply has 0 - 2v variable voltage to provide the stopping potential for electrodes. • the lamp house, filter wheel and photo tube housing are placed on an optical rail. ( please refer nit document for complete specifications ) => limited