====== Diffraction ======
----

==== Diffraction scanner ====

  * Optical rail
  * 3 post holders
  * Laser
  * Vernier diffraction slits in holder
  * Diffraction scanner
  * Lab Quest Mini
  * 2 analog to telecom wires
  * Meter stick

| {{:phylabs:lab_courses:phys-120_130-wiki-home:spring-experiments:diffraction:diffraction_scanner.png?direct&400|}} | {{:phylabs:lab_courses:phys-120_130-wiki-home:spring-experiments:diffraction:diffraction_scanner_2.png?direct&400|}} |

**Setup**:
  * Make sure the laser works. (If it buzzes, it is dying and should be replaced.)
  * Align the laser, diffraction gratings, and scanner so that the diffraction pattern appears at the right level on the scanner.
  * Make sure that you are using the correct "analog-to-telecom" wires and connect Port 1 to Ch1 and Port 2 to Ch2 on the Lab Quest Mini.
  * Download the diffraction scanner configuration file, open it, and test the readings on the diffraction scanner apparatus. 

==== Spectrometer ====

  * Spectrometer (w/ eyepiece and w/ magnifying glass)
  * Diffraction grating (mounted on post)
  * Cloth cover
  * Webcam and mounting
  * Mercury lamp (mounted on a ring stand)

| {{:phylabs:lab_courses:phys-120_130-wiki-home:spring-experiments:diffraction:diffraction_spectrometer.png?direct&400|}} |

**Setup**:
  * Make sure the mercury lamp lights up when plugged in (and turned on, if applicable).

==== Diffraction Demo ====

  * Rail w/ diffraction demo parts
    * Laser (w/ diverging lens)
    * Diffraction objects on mount (slide with dots, pin, razor blade)
    * CCD camera
    * Webcam (optional, in place of CCD camera)
  * TV monitor
  * BNC cable (to connect camera to monitor)

| {{:phylabs:lab_courses:phys-120_130-wiki-home:spring-experiments:diffraction:diffraction_demo1.png?direct&400|}} | {{:phylabs:lab_courses:phys-120_130-wiki-home:spring-experiments:diffraction:diffraction_demo2.png?direct&400|}} |

**Setup**:
  * Make sure the laser works. (If it buzzes, it is dying and should be replaced.)
  * Connect the CCD camera to the monitor and turn the monitor on
  * Align the laser (with diverging lens), demo objects and camera so that the light hits the CCD sensor.
    * OPTIONAL: If using the webcam, omit the CCD camera/monitor combo and instead us the built-in "Camera" software on Windows.
  * Position the demo objects such that you create a nice, clear pattern on the monitor.

==== Common area ====

  * Filament lamp

**Setup**:
  * Place a single filament lamp in the room (usual in a back corner) and make sure it lights up and works.
  * This lamp is used when it asks the students to look at a far away "line" light source.

| {{:phylabs:lab_courses:phys-120_130-wiki-home:spring-experiments:diffraction:diffraction_fillament.png?direct&400|}} |

  * Extra parts
    * Laser
    * Diffraction grating in holder
    * Diffraction scanner
    * Lab Quest Mini (w/ USB cable)
    * Analog to telecom wire(s)
    * Diffraction grating(s)
    * Mercury lamp
    * Webcam (w/ mount)

| {{:phylabs:lab_courses:phys-120_130-wiki-home:spring-experiments:diffraction:diffraction_common.png?direct&400|}} |