PHY221 Physics Lab II
2017 Monsoon Semester
For the 2016 BS-MS batch
Instructors: Bhas Bapat (Coordinator), Ashna Bajpai, Atikur Rehman, Rejish Nath
Assistants: Deepak Sharma, Ankita Niranjan, Krithika V R and Vikhyaat Ahlawat
This course has experiments in Optics and Heat.
Roll-number-wise sequence of experiments
Your interaction with the TAs is of immense importance. You must show the TAs what you do and what you record. Get your observations signed and dated by the TA. This is your responsibility, not of the TA. This endorsment is the only valid record of having done the experiment.
You should try your best to finish an experiment in one session. Complete your analysis in the subsequent days and bring back the completed lab notebook next week. Following that week's experiment, hand over your notebook to the TA and collect it after 1.5 day. You will be quizzed by the instructor(s) on the experiment that has been evaluated by the TA.
Please follow the sequence of experiments week after week according to your position in the list of students within your batch. You will get one session after every four assigned experiments to finish incomplete tasks. If you have no pending work, you may do an additional experiment in consulatation with the instructor. You cannot do a subsequent experiment unless you have completed at least the previous three.
Till the mid-sem Deepak Sharma and Ankita Niranjan will be TAs for batches 3,4 (Mondays and Tuesdays). Till the mid-sem Krithika V R and Vikhyaat Ahlawat will be TAs for batches 1,2 (Tuesdays and Wednesdays). After the mid-sem the TAs will exchange batches.
As part of this lab there are two fun experiments. There is no special time earmarked for this. Do these whenever you find a little time off from your regular experiments.
One is to measure the length and period of a few pendula (5 pendula of different lengths). Measure the time taken for 10 oscillations and repeat this as many times as possible throughout the semester. At the end of the exercise, your batch should be able to say that
The second experiment is to measure the diameter of peas from a sample. This too is to be repeated as many times as possible throughout the semester. To approximate the pea to a sphere, measure in a few places the approximate diameters for each pea you pick up. Measure the diameter for as many peas in one go as you can. Also measure the mass of the pea – here you are asked to measure the mass of 20 peas together and not of an individual pea. At the end of the exercise, your batch should be able to present the distribution of the sizes of peas and state that
The idea behind these exercises is to understand the importance of large number of observations, distribution of experimental values, confidence in measurements etc. You can store the values you measure using a google form, so that we have a consolidated record of the observations of the entire batch. Please contact your TAs for details.
General Notes Regarding Experiments
These are supplementary materials related to the experiments. Please do not follow these line-by-line for either the procedure or for the analysis. They are only meant to serve as rough guides.
The documents above are copies made available on the internet by the respective authors on as-is basis. Authors are acknowledged with thanks!