Chemistry In Focus
Chemistry In Focus
7th Edition
ISBN: 9781337399692
Author: Tro, Nivaldo J.
Publisher: Cengage Learning,
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Chapter 11, Problem 4E
Interpretation Introduction

Interpretation:

The working of a barometer is to be described.

Concept Introduction:

A barometer is an instrument used for measuring atmospheric pressure. There are mainly two types of barometers, namely a mercury barometer and an aneroid barometer.

The force exerted on the surface of an object per unit area by the weight of air is called atmospheric pressure.

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As you can see in the picture, the instrument uses a Xe source. Given that the instrument is capable of measuring from 200-800nm, if Xe was not used, what other source(s) could be used? Refer to figure 7-3. How many monochrometers does this instrument have? Why? Trace the light as it goes from the Xenon lamp all the way to the circle just slightly to the right and a little bit down from S4. What do you think that circle is? In class we talked about many types of these, which kind do you think this one is for a fluorimeter? Why? Explain. What is/are some strategy(ies) that this instrument has for dealing with noise that you see present in the optics diagram? Why does a fluorescence cuvette have to be clear on four sides?
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