2.   What is the name of the instrument you used to look at the visible spectrum?
 
 

3.  Name four common light sources you can find in your classroom.
          1.
          2.
          3.
          4.
 

4.  Compare the results of the incandescent light bulb with the spectra of the fluorescent light tube fixture. Based on what you saw, can you think of a reason why the fluorescent lights are more "energy efficient"?
 
 
 

Look at this web page:
http://mo-www.harvard.edu/Java/MiniSpectroscopy.html
Click " here and look at 3 different Spectra."

5.  Draw the spectrum
Light Source: Red LED (Like the little red light on your cell phone.)

a.  Is the red light made by just one wavelength?  ____
b.  What is the range of the wavelengths that make up the red light?  ___________________
c.  Explain in your own words what a red LED spectrum is.
 
 
 
 
 

What is Light

Link I What is light? http://cse.ssl.berkeley.edu/light/measure.html

6.  What are the two ways to think about light?   As a _____________ and as a  _________________.7
7.  What is the speed of light?  ________________________

8.  When does the speed of light change?

9. What is Visible light?
 

10.  What is the Electromagnetic Spectrum?
 
 

11.   What is the basic difference between different types of light?
 

12.   What is the definition of Wavelength?  AND What is the symbol for wavelength?
 

13.  Label a distance of 2 wavelengths on this diagram:
 

       
14.  What unit is used for measuring wavelength? _______________________
 

15.  What is the definition of Amplitude?
 

16.  Amplitude is a measure of  ___________________________________________________.

17.   What does the wave length of a wave tell you?
 

18.  What does the amplitude of a wave tell you?
 
 
 

LINK II  What is the Electromagnetic Spectrum? http://observe.ivv.nasa.gov/nasa/education/reference/emspec/emspectrum.html

Visible Light is one kind of Electromagnetic Radiation

19.  Write the names of the 7 kinds of 'electromagnetic radiation.

Kinds of Electromagnetic Radiation
1	longest wavelength
2
3
4
5
6
7	Shortest wavelength

20.  What kind of 'light'  has the LONGEST wavelength?  _______________________

21.  What kind of 'light' has the SHORTEST wavelength?  _______________________

22.   What is the relationship between wavelength and energy?
 

23.  Where is visible light in the electromagnetic spectrum?  __________________________________

24.  What are Cosmic Rays?
 
 
 
 

25.  Matching _____  1.  energy that passes through _____  2.  energy that stops at an object _____  3.  energy that bounces off an object _____  4.  first thing radiation hits when it comes to Earth _____  5.  what happens to a surface that  absorbs energy _____  6.  the reflective quality of a surface _____  7.  a white cloud _____  8.  a black sandy beach _____  9.  absorbs much of the Sun's energy _____  10.  reflects much of the Sun's energy _____  11.  transmits much of the Sun's energy

A.  albedo B.  it heats up C.  reflected energy D.  transmitted energy E.   absorbed energy F.  cryosphere G.  atmosphere H.  hydrosphere I.   the top of the atmosphere J.   absorbs light energy K.  reflects light energy

 

26.  Matching the Meaning ____  1.  energy ____  2.  balance ____  3.  absorb  ____  4.  reflect ____  5.  radiate ____  6.  emit ____  7.  conduction ____  8.  convection

A.  To bounce it away B.  To send out in all directions C.  Incoming equals outgoing D.  To take in, soak up E.  The capacity to do work F.  When energy is carried by a moving liquid or gas G.  When energy travel through a solid H.  To release, or send out

Student Electromagnetic Spectrum Reports

27.   Which wavelength did you choose to report on?   ______________________

28.  Tell the most interesting thing you learned about your wavelength.
 
 
 

29-30.   Pick two other students and read their EM Report on the web.
 

1. Student Name __________________________   School _____________________ 2. Wavelength studies:  __________________________________ Two interesting things you learned from this web page:

1. Student Name __________________________   School _____________________ 2. Wavelength studies:  __________________________________ Two interesting things you learned from this web page: