bids are invited for photoelectric effect apparatus - ( 1 ) mercury light source enclosure ( 2 ) track, 60 cm ( 3 ) photodiode enclosure ( 4 ) mercury light source power supply ( 5 ) dc current amplifier ( 6 ) tunable dc ( constant voltage ) power supply optical filer, apparatus and caps 1. filer wheel ( 365, 405, 436, 546, 577 nm ) 2. aperture dials ( 2 mm, 8 mm dia. ) cables and cords 1. power cords3 ( 110 v version ) ( 2 ) bnc connecting cables ( 3 ) photodiode enclosure ( 4 ) connected cable red ( 5 ) connected cable, black ( 6 ) interface cable 3, replacement items 1. replacement mercury lamp ( 2 ) replacement photodiode tube , fabry perot interferometer - 1. optical rail - length: 1000 mm; quantity: 01 no. 2. fabri perot interferometer - diameter: 25 mm; r / t: 60:40 - spacing of plates: 2.8 mm variable - least count of micrometre: 0.01mm; quantity: 01 no. 3. plano convex lens with mount supply - diameter: 20mm; elective focal length: 26 mm; quantity: 01 no. 4. diffuser screen with measurement unit - size: 150 x 138 x 3mm; quantity: 01 no. 5. diode laser with poser supply red - wave length: 650 mm; optical power: 5 mw - quantity: 01 no. 6. diodelaser with power supply green - wave length: 532 mm; optical power: 5 mw - quantity: 01 no. , gyroscope - 1. scale: -400 to +400 ( 2 ) scale divisions 10 ( 3 ) mass of additional weight 50 g ( 4 ) disc. 1500g ( 5 ) mass of counterweight 1400g ( 6 ) total weight: 4650g , youngusmodulus appratus - 1. battery for stain gauge 9 v, 6f22 ( 2 ) dimensions: 550 x 280 x 500 mm3 ( 3 ) weight: 5.5 kg approx. contents: - 6 flat steel rods ( w: 15 mm, 1: 200 / 300 / 400 mm thickness: 2 / 3 mm ) ; strain gauge unit ; horizontal beam with stand ; knife-edge bearing; clamping chuck ; set of weight and retaining clamps , biotsavart law - 1. magnetic field sensor, axial / trangential 2. teslameter e 3. optical bench u, 600 mm 4. optical rider u, 75 mm ( 2x ) 5. dc power supply 0-16 v, 0-20a 6. pair of safety experiment leads, 75 cm , kater’s reversible pendulum - 1. height of apparatus with pendulum: 1.25 m approx. 2.pendulum rod 1.2 m; 3. separation of bearing points: ( 800 mm ) 4.period of adjusted pendulum: 1794 ms, when g = ( 9.81m / s2 ) . 5. total weight 3.3 kg approx.. additionally required: - light barrier - digital counter ( 230 v, 50 / 60 hz ) - digital counter ( 115 v, 50 / 60 hz ) total quantity : 1