Spectroscopy

Question 1

Define wavelength

Answer 1

Wavelength is defined as the distance between adjacent peaks

Question 2

Define colorimetry

Answer 2

Colorimetry is the science of measuring colours

Question 3

What is a colorimeter (in general)?

Answer 3

Any tool that characterises colour samples to provide an objective measure of colour characteristics

Question 4

What is a colorimeter (in chemistry)?

Answer 4

The colorimeter is an apparatus that allows the absorbance of a solution at a particular frequency (colour) of visual light to be determined

Question 5

What is a spectrophotometer?

Answer 5

A photometer (a device for measuring light intensity) that can measure intensity as a function of the colour, or more specifically, the wavelength of light

Question 6

What is spectroscopy?

Answer 6

A type of chemical analysis done by shining light on a sample to determine what is inside

Question 7

What does a spectrophotometer consist of?

Answer 7

A spectrometer and a photometer

Question 8

What is the purpose of the spectrometer in the spectrophotometer?

Answer 8

It produces light of any selected colour (wavelength)

Question 9

What is the purpose of the photometer in the spectrophotometer?

Answer 9

It measures the intensity of light

Question 10

Define absorbance.

Answer 10

A quantitative measure of the extent to which a compound absorbs ultraviolet-visible radiation at a particular wavelength

Question 11

Define transmission.

Answer 11

A quantitative measure of the extent to which a compound absorbs ultraviolet-visible radiation at particular wavelength