• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

What is Spectroscopy?

Extracts from this document...

Introduction

What is Spectroscopy?

Spectroscopy is the study of energy levels in atoms or molecules, using absorbed or emitted electromagnetic radiation. There are many categories of spectroscopy eg. Atomic and infrared spectroscopy, which have numerous uses and are essential in the world of science. When investigating spectroscopy four parameters have to be considered; spectral range, spectral bandwidth, spectral sampling and signal-to-noise ratio, as they describe the capability of a spectrometer. In the world of spectroscopy there are many employment and educational opportunities as the interest in spectroscopy and related products is increasing. However Spectroscopy is not a recent development, as it has been utilized for many years since Isaac Newton made the first advances in 1666. Spectroscopy is the study of light as a function of wavelength that has been emitted, reflected or scattered from a solid, liquid, or gas.

Fundamentals of Spectroscopy

Spectroscopy is the distribution of electromagnetic energy as a function of wavelength. Spectrum is basically white light dispersed by a prism to produce a rainbow of colours; the rainbow is the spectrum of sunlight refracted through raindrops. All objects

...read more.

Middle

Functions and Description of a spectrometer

Fig 1. Schematic diagram of a spectrometer employing photomultiplier as detector.image00.png

A spectrometer usually shows pointed distinct features, instead of curving wavelengths; the sharp structure used is particularly obvious when the substance investigated includes atoms in the gas stage. The sharp characteristics normally appear in clear patterns, and the precise line pattern observed is strongly characteristic of the chemical species producing it, and the spectrum is always, repeat always, a unique signature that signifies the presence of that species.

The different spectroscopy terms cover the spectrometer’s aptitude in different areas. Spectral range covers spectral absorptions and has various spectral ranges that are controlled by detector technology, for example: ultra-violet, visible, near infrared and etc, also the wavelength range is sometimes referred to in the distant sensing idiom as the visible near infrared. The spectral bandwidth concerns the width of an individual spectral channel in the spectrometer, and the narrower the spectral bandwidth is, the narrower the absorption feature the spectrometer will accurately measure. The spectral sampling is the distance in wavelength between the spectral

...read more.

Conclusion

Mass Spectroscopy

Mass Spectroscopy is a diagnostic technique that is used to classify unknown substances, to measure those compounds and to illuminate the structure and chemical properties of molecules. Mass Spectroscopy is used to identify structures of biomolecules, perform forensic and environmental analyses, to identify and quantitate compounds of complex inorganic mixtures and to perform ultra sensitive multielement inorganic analyses. Mass spectroscopy originated in 1919 by a British scientist named Francis Aston when a machine was created for the purpose for measuring the proportions and masses of the atomic species in part of a sample. A mass spectrometer is an instrument that measures the masses of individual molecules that have been converted into ions e.g molecules that have been electrically charged. A Mass Spectrum is a plot of ion intensity as a function of the ion’s mass-to-charge ratios.

Spectroscopy is a diverse and complex branch of science. It has many uses and is widely acknowledged as an essential part of development in the world of science.

A spectrum is an image or distribution of colour of any electromagnetic radiation arranged in a progressive series according to wavelength.

...read more.

This student written piece of work is one of many that can be found in our GCSE Radioactivity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

4 star(s)

This is a well researched report.
1. The information sources need to be included.
2. The uses of images is good.
3. The language used is concise.
****

Marked by teacher Luke Smithen 05/07/2013

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Radioactivity essays

  1. Mutagenesis: The Effect of Radiation on Radish Seeds.

    When exposed to moderate amounts of radiation, radish seeds tend to exhibit phenotypic changes, such as growth defects and discoloration. All seeds are exposed to natural radiation, as is everything in the world. Consequently, a small amount of radiation is predicted to have null effect on the growth of plant seeds (Health Physics Society).

  2. Should we build more nuclear power stations?

    There are, however, a couple of very important factors. One of these being, that fossil fuels are rapidly running out which means that an alternative energy source must be used sooner or later. This is not the most important reason that we should change to nuclear power however. I believe that the best reason for changing to nuclear power

  1. Ultraviolet radiation and skin cancer

    protect ourselves from the most damaging solar radiation can be classified under the term 'behavioural protection'. For example, it is recommended that we stay inside or seek shade during the peak hours of solar radiation, from 10 a.m. to 2 p.m.

  2. Nuclear Physics GCSE

    It was noticed that an angle greater than ten degrees caused much more alpha particles to scatter than predicted. * As only a small proportion of particles were scattered, it seemed as though whatever caused the force had to be very small.

  1. Thermionic emission and Radiation and half-lives.

    In x-ray machines, thermionic emission occurs in vacuum tubes. There is a cathode which is also a heating filament so as to allow high temperatures but also to provide a large area from which thermionic emission can occur. The filament emits electrons very effectively when it is red-hot therefore it is supplied with a huge voltage (70KV)

  2. Nuclear medicine is a field of medicine that uses radioactive substances to diagnose and ...

    radioactive substance that chemically is drawn to different organs, bones or tissues around the body. Many organs that are not visible by other radiographic techniques become visible by using radioactive substances, which are opaque to radiation. Once the substance reaches its destination it produces an emission that is transformed into a visible image.

  1. The primary objective of this experiment is to familiarize with the use of an ...

    Bending vibrations are also divided into in-plane bending and out-of-plane bending. In-plane bending happens when the two atoms remain in the same direction as the third atom, and it is further divided into 2 different phenomena called rocking and scissoring.

  2. Ernest Rutherford and the Atom article

    Rutherford). A large part of coming up with scientific hypothesis requires creative thought. It is necessary for scientists to always use their imagination in a scientific investigation. The real purpose of conducting an investigation is to comprehend something by using something audacious and outward.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work