bids are invited for consumables physics department dbt star convex lens , equilateral crown glass spectrometer prism , spectrometer prism , borosil glass beaker , burette , capillary tube glass , students diffraction grating , diode 1a , diode 5a , zenar diode twelve volt one watt , zenar diode nine point one volt one watt , bc one zero seven a transistor , metal needles with pointer for liquid lens and capillary rise experiments , cork to fix metal needles , cork with hole of diameter zero point seven cm , rubber tube , ic seven four one op amp , resistors , wooden scale made of teak 1m length , bread board , soldron soldering iron , soldering lead , soldering flux , doated soldering practice board , electrolytic capacitors , ceramic capacitor , acetone , nitric acid total quantity : 1943