Try Answering This

1. Ultraviolet light penetrates our skin and gets stopped (absorbed) by the tissues just beneath it. X-rays penetrate all the way through skin and muscle and are finally stopped by bones and denser objects. Why does X-ray light get farther into our bodies than ultraviolet?

2. When you tune your radio (it receives radio light!) to a particular station, the dial shows the frequency at which the station broadcasts. For example, to listen to WROC you turn the dial to 101 Megahertz (101 million cycles per second). Instead of displaying the frequency, could the dial on the radio just as well show wavelength? Why?

3. What if we lived on Venus instead of Earth? The dense clouds forever blanketing that planet would block all starlight. Would we ever know that there are such things as stars?

4. Why is the order of colors in a rainbow always the same? For example, why is red never right next to blue??