Webquest

Types of Visible Light Spectrum **Webquest Activity** Conduct a search of the internet to find out about the different types of visible light spectrum. This search should include information on continuous spectrum, line emission spectrum, and line absorption spectrum. Make sure to cite the websites that you obtained your information for this assignment. You should have a minimum of two sources for this assignment.

1. What are the characteristics of a continuous light spectrum? Where can we observe a continuous spectrum in nature?

2. What is a line spectrum? What is the difference between a line emission and line absorption spectrum? Give an example of a situation in which we can observe a line emission and a line absorption spectrum. Be specific with your answer.

3. Which type of spectra did you observe in your laboratory experiment?

4. Consult the image of the line emission and line absorption spectrum of the element hydrogen below.

Are there any patterns present in these line spectra of hydrogen? If so, explain the pattern that you have found. 5. What causes the solid lines and dark spots in line emission spectrum? How does this relate to the configuration of the atom? What is occuring in each of these types of line spectra? 6. Look up the scientist Niels Bohr. How does Niels Bohr's model of the atom explain why line spectrum occurs? What is happening at the atomic level to cause this light radiation to be given off? 7. What does it mean for an electron to be in an excited state? What factors can cause an electron to become in an excited state? 8. How does an electron return to the ground state? What must an electron give off in order to arrive at the ground state? 9. What factor effects the intensity of light, the color of light, and the type of electromagnetic radiation that is given off by the electron? 10. Can line spectra be used to identify specific elements or compounds? Explain your answer. 11. What are some real world applications of using light emission? Explore the applications of glow in the dark, phosphorescence and chemilluminescence. 12. How can utilizing line spectra help us to better explain and understand the stars in our universe?