These settings will remain the same for the rest of the lab. You will be using again the “Slits,” section of this simulation and the “light,” waves by using the laser pointer icon.
In place of the physical apparatus described in this section, you will be using the following digital simulation to replicate the experiment: Select the laser pointer icon from the menu on the right side to change from water to light. Go to the “Slits,” section of the simulation.
Go to the “Waves,” section of the simulation.
Final submission of the formal report is due either three days after receiving TA feedback on your draft or two weeks after your synchronous lab session at the lab start time, whichever occurs later in time. Using the same example as above- if your lab session occurs Monday at 9:00AM, your final submission of the formal report would be due two weeks later Monday at 9:00AM. Two weeks after your synchronous lab session at the lab start time. Drafts must be complete and are not accepted late. For example, if your synchronous lab session for Ohm’s Law takes place on Monday at 9:00AM, your draft would be due the following Monday at 9:00AM. This is due one week after your synchronous lab session at the lab start time. You may write an optional draft of your formal report to receive feedback from your TA. All students must still attend their lab session to receive information from their TA about this lab. In addition to the Pre-lab, data collection from the simulation should be completed individually before attending your lab session. pdf submission per student is needed in Husk圜T. All work on this week’s lab should be done individually and no collaboration with your group or other students is permitted. The width of diffraction fringes is always unequal.This week you will work individually to write a Formal Report. The width of interference fringes may or may not be equal. The intensity of minima is never zero and hence there is poor contrast between bright and dark bands. The intensity of minima is generally zero, and there is a good contrast between bright and dark fringes. In the case of diffraction, the bright bands are not of the same intensity. In the case of interference, all bright bands are of the same intensity. Interference is due to the superposition of two different wavetrains coming from two coherent sources.ĭiffraction is due to the superposition of secondary wavelets from different parts of the same wavefront. According to Fresnel, diffraction occurs due to mutual interference of secondary wavelets which are not blocked by obstacle.įollowing are the points of difference between Interference and Diffraction of Light- Interference For visible light, the diffraction phenomenon is not so common, because the wavelength of visible light is very small ( ≅10 -6m) and obstacles of this size are hardly available. In the case of sound waves and radio waves, diffraction is observed readily because the wavelength of these waves is large and obstacles of this size are readily available. Also, the diffraction becomes much more pronounced, when the size of the obstacle is comparable to the wavelength of light. 
Due to this, the light spreads into the regions of the geometrical shadow of the obstacle. At the points, where the resultant intensity of light is maximum, Interference is said to be constructive and at points, where the resultant intensity of light is minimum, the interference is said to be destructive.ĭiffraction- It is the phenomenon of bending of light around the corners of an obstacle in the path of light.
Interference- Interference of light is the phenomenon of redistribution of light energy due to the superposition of light waves from two coherent sources.
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