From their positions alongside the spectrum under study, the wavelengths of each of the unknown lines may be determined. The wavelengths of the various lines of iron are well known. Usually, the standard (iron) spectrum is placed above and below the spectrum under study. The instruments are arranged so one spectrum appears along-side the other on the same film. What kind of a shift does STAR 3 have, a red shift or a blue shift? WHAT DOES THIS TELL US ABOUT STAR 3? To avoid problems caused by improperly aligned scales, a spectrum of a laboratory source (usually iron, because it has so many lines) is taken just before or after the spectrum of the object being studied. What element is in STAR 3, A, B, C, D, or E? 6. Does STAR 2 contain elements other than those listed? EXPLAIN YOUR ANSWER. Does STAR 1 contain elements other than those listed? EXPLAIN YOUR ANSWER 4. What elements are in STAR 12 State each letter one time only. RED COLOR: BLUE GREEN YELLOW ORANGE NA SPECTRUM OF: ELEMENTA: ELEMENT : ELEMENT C: ELEMENT D: ELEMENT E: STAR 1: STAR 2: STAR 3: 1.
Time of element color of discharge bright color lines as seen through the grating 1 1. There are six discharge tubes and six elements. If you see more than one line of any color, write the number of lines of that color that you see. In the third column, write the colors that you see in the spectrum in order from blue to red. In the second column write the color that the discharge appears to the naked-eye.
In the first column write the name of the element associated with discharge tube being viewed. Using the Spectra Photosheet, complete the table below. The color blue is usually the first line of color (if it's present.) 1.
#Photosheet series
The series of colored bands close together is the spectrum. Then there should be a gap and then a series of colored bands close together. The vertical band seen furthest to the left is essentially, the naked-eye image. In the spectrun images, you should see a series of bright colored vertical bands of light. For each pair of images, the first will be a 'naked-eye' image of the discharge and the second is an image of the discharge as seen through a diffraction grating, revealing the discharge spectrum. Each image is identified with a label identi- fying the type of gas in the discharge.
In this way, a gas can be identified by analysing its spectrum PROCEDURE TEME The Spectra Photosheet contains six pairs of images. OTWEMJE This procedure will show us that different gases produce different spectra. Then we make a note of the particular lines of color in each spectrum. The grating will split the light for the discharge into a spectrum of colors. Then we will look at the glowing gas through a diffraction grating. For each tube we will write down the type of gas inside and also note the color of the glow produced by the gas discharge. When a high voltage is applied to a tube, the gas inside the tube will glow. Each of these tubes contain a different type of gas vapor. In this remote version, we will try to simulate the procedure of the real-life version Brief description of real-life procedure In the real-life version of this lab, we start with a series of six gas discharge tubes. Transcribed image text: MATERIALS: Spectra Photosheet This is a remote version of the Spectra Inb, which we would normally do in the classroom.
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