for concave & convex explanations, read "lenses" in "Lab Station 6" section.
Separating White Light (Lab Station 2)
Sound and Amplitude (Lab Station 3)
How sound works
Colored Filters and Light (Lab Station 4)
...now see for yourself!
Magnetism and Compasses (Lab Station 5)
Concave & Convex Lenses (Lab Station 6)
...More about lenses
What does the ELECTROMAGNETIC SPECTRUM have to do with me?
List the examples given in order of highest energy to lowest.
Now tour the ELECTROMAGNETIC SPECTRUM for yourself.
"The Physics Classroom" ~ tutorials for (almost) everything physics