The laboratory instruments are the vernier caliper and the micrometer. This paper presents the customization of Easy Java Simulation models, used with actual laboratory instruments, to create active experiential learning for measurements. Find the difference between two readings, i.e.θĪngle of prism A =.Vernier Caliper and Micrometer Computer Models Using Easy Java Simulation and Its Pedagogical Design Features-Ideas for Augmenting Learning with Real Instruments.Note corresponding main scale and vernier scale reading in both vernier(vernier I and vernier II).Rotate the telescope in opposite direction to view the reflected image of the collimator from the second face of prism.Note corresponding main scale and vernier scale reading in both vernier (vernier I and vernier II).Rotate the telescope in one direction up to which the reflected ray is shown through the telescope.Prism table is rotated in which the sharp edge of the prism is facing towards the collimator.Find the difference between two angle ie 2θ.Move the telescope in the opposite direction and do the same.Then note the reading in the tabular coloumn. Make coincide the slit with the cross wire using fine angle adjusting slider. Move the telescope using Telescope slider, up to see the slit on side.Place the edge of prism, pointed towards collimator.Clamp the prism in which the sharp edge is facing towards the collimator, and base of the prism is at the clamp.Adjust the base leveling screw till the bubble come at the centre of spirit level. Place prism table, note that the surface of the table is just below the level of telescope and collimator.Focus collimator slit using collimator focusing adjustment.Place the collimator directed towards sodium vapor lamb.Place the telescope parallel to collimator.Turn the telescope towards window, focus the telescope to a long distant object.Turn the telescope towards the white wall or screen and looking through eye-piece, adjust its position till the cross wires are clearly seen.Coincide the slit with cross wire in the telescope.Adjust the slit width using Slit width slider.Focus the slit using Slit focus slider.Switch on the light by clicking Switch On Light button.When focus is correct, start button is activated.Here we get the zoomed view of vernier I and II by placing mouse pointer over it. Vernier Table: Using this slider, we can rotate fine angle. Telescope: This is used to fine adjust the telescope. Vernier Table: Vernier table can be rotate using this slider. Telescope: Using this slider one can move the telescope from its position. Slit width : Using this slider, width of the slit can be adjusted. Slit focus : This slider used to focus the slit while looking through telescope. Place Prism/Remove Prism : This switch used to place the prism on the prism table or remove prism from the prism table. Switch On/Off Light : Used to switch on/off the light.
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