Spectral Colours and Associated Phenomena
Spectral Colours and Associated Phenomena
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Spectral Colours and Associated Phenomena
Learning Objectives
At the end of the lesson you will be able to identify the range of wavelengths corresponding to each spectral colour. At the end of the lesson you will understand how light dispersion creates a spectrum of colours. At the end of the lesson you will be able to explain the processes of absorption and emission in relation to spectral colours. At the end of the lesson you will be able to describe the role of spectroscopy in analysing material composition.
What do you already know about spectral colours?
What are Spectral Colours?
Correspond to specific wavelengths in the visible spectrum. Include violet, indigo, blue, green, yellow, orange, and red. Are pure colours that cannot be decomposed further.
Dispersion of Light
Separation of white light into its component colours. Occurs when light passes through a prism. Demonstrates how different wavelengths correspond to different colours.
Absorption and Emission
Substances absorb light at specific wavelengths. Emit light at different wavelengths when energy is released. Key processes related to the appearance of spectral colours.
Spectroscopy
Technique for measuring light spectra. Used to analyse material composition. Helps identify substances based on their spectral signatures.
Definition List
Spectral colours: Colours corresponding to specific wavelengths within the visible spectrum. Dispersion of light: The separation of white light into its component colours through a prism. Absorption and emission: Processes where substances absorb light at certain wavelengths and emit at others.
Spectroscopy: the study of how matter interacts with electromagnetic radiation, including light and other forms of energy.
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
