Consider your radio for a moment. When you select a particular radio station, eg 96.5 MHz you are selecting a particular frequency of wave.
How then do you think the volume of the radio is adjusted? What part of the wave is changed?
If the distance between Connecticut and London is 3500 miles, and if it took only 18.8 ms for light to travel from one city to the another, how fast is light traveling in miles per second?
If all light travels at the same speed, how do you explain the fact that X-rays can pass right through human tissue, but not bone?
What colors or frequencies are plants not absorbing from sunlight? How do you know?
Explain what you understand by the term photon. Describe some of its physical characteristics.