Distance between the central dot and the first order

This preview shows page 6 - 10 out of 10 pages.

distancebetweenthecentraldotandthefirstorderdotusingthemarksyoumadeonthescreen. This is distanceX.Record this measurement in millimeters in Table 2.9.Replace the 500 lines/mm diffraction grating slide with the 1000 lines/mm slide and repeat Steps 36. Turnon the laser light and make observations onhow the projected image has changed.Record your observations in the Data section.10.Turn off the laser light and remove it.11.Replace the laser pointer with a flashlight, and dim the room lights. Turn on the flashlight and record all observations. Repeat with the second grating.In the Data section, draw the resulting spectra using coloredpencils or markers.Laser pointerDiffraction gratingDiffraction maxima (red spots)RulerBookKit boxScreen
We have textbook solutions for you!
/Physics-Laboratory-Experiments-8th-Edition-9781285738567-681/
The document you are viewing contains questions related to this textbook.
Chapter 35 / Exercise 1
Physics Laboratory Experiments
Wilson
Expert Verified
113DataPart 1Observations and drawing for the spectrum produced by the CD and flashlight:Observations and drawing for the spectrum produced by the CD and laser pointer:Lab 10: Light SpectrumWhen putting the flashlight to the cd, aspectrum of colors rainbow type appeared andcover almost all the room, because I had thelights off.The spectrum in this one was less awesomethan the flashlight, in this case the laser lightjust splitted and made a color spectrum barelyvisible
114Lab 10: Light SpectrumPart 2Observations for the laser pointer shone through 1000 and 500 lines/mm diffraction gratings:Observations and drawings for the flashlight shone through the 500 and 1000 lines/mm diffraction gratings:GratingMeasurement of XMeasurement of L500 lines/mm1000 lines/mmTable 2: Distance MeasurementsInstantly the laser pointer light divided in a lotof red laserpoint light, this is because of theglasses of the diffraction gratings58 mm146 mm92 mm154 mmThe flashlight left a spectrum of colors verydifferent from the laser pointer light spectrum
115CalculationsCalculate the wavelength of the laser light for a) d=1/500 mm and b) d=1/1000 mm. Use the modified “gratingequation” given below:nλ = d (X/L)Remember to keep all calculations in millimeters (mm) until the end and then convert your answer to nanometers(1 nm=106mm). Show all your work below:Lab 10: Light Spectruma)d= 0.002Lambda= 0.000794 mmTotal= 794 nmb)d= 0.001Lambda= 0.000597 mmTotal=597 nm
Postlab Questions1.Why did the spectra for the laser light and flashlight differ when reflected from the CD surface?Lab 10: Light Spectrum
2.What was the result of shining the flashlight through the diffraction grating compared to the laser? Explainthis difference.
3.Is the value you obtained for the wavelength of the laser lightconsistent with the range of wavelengths forthe red light? Explain any sources of error that might have caused a large deviation.
116
End of preview. Want to read all 10 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
N/A
Tags
Light, Wavelength, Electromagnetic spectrum, laser light
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Physics Laboratory Experiments
The document you are viewing contains questions related to this textbook.
Chapter 35 / Exercise 1
Physics Laboratory Experiments
Wilson
Expert Verified

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture