Give a creative idea how to begin a lesson. The academic subject for which the text must be created - Chemistry. It should be for students s...
Lesson start ideasGive a creative idea how to begin a lesson
Which subjectChemistry
What age groupYear or Grade 8
What topicLight
Any other preferences


Welcome back, students! Today, we will explore the wonders of light in chemistry. How does light interact with matter? What happens when light is absorbed or reflected? Let's find out!


Let's start with a simple experiment. Each of you will need a small flask containing a clear solution of sodium chloride (NaCl) and a light source. Shine the light into the flask and observe what happens. Does the solution change color? Does it produce any noticeable effects? Take notes of your observations.


Now, let's discuss what just happened. As you might have observed, the sodium chloride solution does not absorb much light in the visible spectrum, so it remains transparent. However, if we were to shine ultraviolet light on the solution, it would produce a blue-glowing effect. This is because the sodium ions in the solution absorb the energy of the UV light and emit it as visible light.

This is just one example of how light interacts with matter in the world of chemistry. Light is an electromagnetic radiation that can excite electrons, induce chemical reactions, and provide valuable information about the properties of substances.


The knowledge of light in chemistry has many practical applications, from designing new drugs to detecting pollutants in the environment. For example, scientists can use spectroscopy techniques to analyze the light that is absorbed or emitted by a sample, and deduce its composition, structure, and concentration.


In conclusion, light is a fascinating and essential element in the field of chemistry. By understanding how it interacts with matter, we can unlock many mysteries and potentials of the universe. So, keep exploring the magic of light in chemistry and see where it takes you!