Lab & General Equipment-> Physical Equipments

1 2 [3] [«Back ]   Click to Enlarge SCALE PANS LIGHT ALLOY WITH CORDS AND HOOK. SCALE DIAMETER : 75 MM WITH CORDS AND HOOKS ........................: 100 MM WITH CHAINS AND RINGS . See Enlarge Click to Enlarge COMPOUND PENDULUM, REVERSIBLE COMPRISES OF A STEEL BAR , 1 METER LONG DRILLED AT 50 MM INTERVALS , REMOVABLE KNIFE EDGES AND A SUPPORT BRACKET FOR MOUNTING ON WALLS. See Enlarge Click to Enlarge WATT'S GOVERNOR WHEN THE GOVERNOR IS ROTATED FASTER AND FASTER , THE BALLS ARE THROWN OUT BY CENTRIFUGAL FORCE IN AN EVER WIDENING CIRCLE.THE JOINTED ARMS ABOVE AND BELOW BEING BROUGHT CLOSER AND CLOSER TOGETHER AS IN WATTS STEAM ENGINE.THIS ILLUSTRATES THE FLATTENING OF PLANETS AT THE EQUATOR OWING TO THEIR ROTATION. WATT GOVERNOR IS ROTATED WITH HELP OF A WHIRLING TABLE. See Enlarge Click to Enlarge WHIRLING TABLE IT CAN BE USED IN VERTICAL OR HORIZONTAL POSITION . IT IS FITTED WITH HAND WHEEL , BELT DRIVEN PULLEY AND ADAPTER FOR MOUNTING NEWTON'S COLOUR DISC , WATT'S GOVERNOR , SAVART'S TOOTHED WHEEL , SEEBECK'S PARATUSES WHICH NEED TO BE ROTATED. See Enlarge Click to Enlarge COLLISION IN TWO DIMENSIONS TO DEMONSTRATE THE PRINCIPLE OF CONVERSION OF MOMENTUM AND SHOW THAT MOMENTUM HAS DIRECTION AS WELL AS MAGNITUDE. CONSISTS OF A CURVED WOODEN RUNWAY 280 X 76 MM LENGTH X HEIGHT WITH AN 8 MM GROOVE,AN INDEX MARK NEAR TOP AND A SLOTTED METAL PLATE AT BOTTOM. A DEVICE CAN BE ATTACHED TO THE PLATE TO PROVIDE SUPPORT TO THE OBJECT SPHERE EITHER EXACTLY OPPOSITE THE RUNWAY OR AT SIGHTLY OBLIQUE POSITION. A PLUMB BOB AND 2 STEEL BALLS ARE PROVIDED. THE APPARATUS CAN BE FIXED TO THE TABLE WITH A G- CLAMP ( WHICH IS NOT PROVIDED ) See Enlarge Click to Enlarge HYDROSTATIC BALANCE FOR DETERMINING SPECIFIC GRAVITY BY ARCHIMEDES PRINCIPLE. WITH ONE PAIR OF LONG FRAMES AND ONE SHORT FRAME WITH A HOOK INDERNEATH FOR SPECIFIC GRAVITY EXPERIMENTS. WITH THREE PANS ,ADJUSTABLESTAND AND SCALE. MOUNTED ON A WOODEN BASE. See Enlarge Click to Enlarge INERTIA BALANCE FOR INVESTIGATING THE NATURE OF MASS AND THE DISTINCTION BETWEEN MASS AND WEIGHT. TWO METAL TRAYS 130 X 55 X 23 MM ARE JOINED TOGETHER WITH TWO SPRING STEEL STRIPS OF 10 MM WIDTH , THE DISTANCE BETWEEN THE TRAYS BEING 215 MM . ONE TRAY IS DRILLED TO ACCEPT 3 EQUAL CYLINDRICAL MASSES. THE OTHER TRAY CAN BE CLAMPED TO A BENCH HORIZONTALLY OR VERTICALLY. COMPLETE WITH 3 MASSES AND A G-CLAMP. See Enlarge Click to Enlarge Michelson-interferometer (0725) In a Michelson-interferometer a coherent light beam is separated into two rays travelling in different directions by inserting a half-silvered mirror in the path. The separated beams are reflected back along themselves and then recombined. The viewing scree n then exhibits an interference pattern that changes perceptibly when the optical path lengths for each of the split beams are changed by fractions of the wavelength of light. EXPERIMENT PROCE DURE : • Determine the wavelength of a laser. • Determine the refractive index of air as a function of pressure. • Determine the refractive index of glass. • Determine the quality of the surface of a strip of adhesive tape. BASIC PRINCIPLE : The Michelson interferometer was invented by A. A. Michelson originally to demonstrate whether the Earth could be observed to be in motion through an ether in which light was once thought to propagate. His design has nevertheless proved crucial for making interferometric measurements, e.g. of changes in length, thickness of layers or refractive indices. A divergent light beam is split into two by a half-silvered mirror and the two resulting beams travel along differing paths. They are then reflected back on themselves and recombined so that interference patterns can be viewed on a screen. The resulting pattern is highly sensitive to any differences in the optical paths covered by the split beams. If the refractive index remains constant the degree of change in the geometric paths can be calculated, e.g. changes in size of various materials due to thermal expansion. If by contrast the geometry is maintained, then refractive indices or changes in them due to pressure, temperature or density variations may be determined. See Enlarge 1 2 [3] [«Back ] Go to Top