Homework - Ultraviolet, Infrared and Lasers

1. What do the letters in the word LASER stand for.
2. How is the light emitted from a laser different from the light emitted by a light bulb. (State two differences and remember lasers need not be 'more powerful')
3. What does the word monochromatic mean?
4. Give three uses of lasers in medicine.
5. What is meant by photocoagulation?
6. What is a particular advantage of a carbon dioxide laser?
7. How can a laser beam be directed to internal parts of the body without cutting open the patient?
8. Write out the colours of the visible spectrum in order, starting with the longest wavelength first.
9. What are the names of the two types of electromagnetic radiation which are just outside the visible part of the electromagnetic spectrum.
10. How do the frequencies and wavelengths of these radiations compare with visible light.
11. How can these radiations be detected?
12. How can these radiations be useful in medicine?
13. How can these radiations be dangerous to living organisms and what can be done to protect against these dangers.
14. What is melanoma?
15. At what speed do all forms of electromagnetic radiation travel?

Optional Questions - Research

1. What is a MASER?
2. What does coherent mean as applied to laser light?
3. How can IR and UV wavelengths be used in astronomy?
4. Who was James Clerk Maxwell?