Camera
From Physics 111-Lab Wiki
Do NOT Use Camera
DO NOT Use the Camera NO Film available use the LabView Program
- Photos are NOT available at this time = DO NOT Photograph any spectrum. Use the Polaroid 4X5 sheet camera available. Instructions for loading the film are below; you should put the camera in the camera holder before you load the film. You will have to choose a way to start and stop exposures to the film. Remember to change the position of the film by about 10 mm between each exposure, increasing exposure times as suggested below. You should get no fewer than three exposures on each piece of film, and you should be able easily to get five to six. Keep in mind that you will want to compare this mercury spectrum to the hydrogen spectrum, so record any information necessary to do this before changing any settings. Try different exposure times, something like 1 sec, 3 sec, 10 sec (increase times by a factor of 3 with each exposure), changing the position of the film by about 10mm for each exposure. Identify and label the wavelengths of the most prominent lines, referring to the references for these wavelengths.
Exit slit shown to the right without camera mounted.
Slide the camera down into the holder with the develop leveler outward toward you.
Below is the correct mounting of the camera into the holder.
4 inch x 5 inch sheet film Polaroid Camera
See top shinny level it is in the L = Load position; you load the film in this postion only. - Load the film: Hold film with the words "THIS SIDE TOWARD LENS" toward the source of the light. If you put the film in wrong then call for help from one of the Staff.
- Push the film into the top end of the camera all the way down untill it stops. Note: take care not to buckle the film. The film should be even with the top of the camera.
- To take a picture: Now withdraw the outer envelope, the outer paper envelope covers the film negative, untill it comes to a stop. The number 57 should now be fully visible, DO NOT pull it any out any further. Now open and close the shutter manually to expose the film; i.e., you should have at least four to six exposure lines on each piece of film. See example below.
- Example below of five different exposures and the labelling of the lines on the photo. What numbers should you use to label them? Below is only an example.
- Now that you have exposed the film, reinsert the film envelope cover carefully until the end of the envelope is even once again with the top of the camera. Now move the develope level to the "P" position. Firmly hold down the camera with your left thumb at the "L" position and then hold the film packet firmly with your right hand thumb and forefinger and and pull the film all the way out. Pull smoothly at medium speed, without slowing down or stopping. You will feel a slight resistance toward the end as the metal end reaches the rollers. Now the film will develop in about 30 seconds, don't forget to coat thefilm with the coaters provided.
- Photos are NOT available at this time = DO NOT Photograph any spectrum. Use the Polaroid 4X5 sheet camera available. Instructions for loading the film are below; you should put the camera in the camera holder before you load the film. You will have to choose a way to start and stop exposures to the film. Remember to change the position of the film by about 10 mm between each exposure, increasing exposure times as suggested below. You should get no fewer than three exposures on each piece of film, and you should be able easily to get five to six. Keep in mind that you will want to compare this mercury spectrum to the hydrogen spectrum, so record any information necessary to do this before changing any settings. Try different exposure times, something like 1 sec, 3 sec, 10 sec (increase times by a factor of 3 with each exposure), changing the position of the film by about 10mm for each exposure. Identify and label the wavelengths of the most prominent lines, referring to the references for these wavelengths.
