1. Which part of the electromagnetic spectrum has a higher frequency than ultraviolet waves? a. infrared b. microwaves c. x-rays d. none of these 2. Which part of the electromagnetic spectrum has a longer wavelength than visible light? a. gamma rays b. radio waves c. ultraviolet waves d. X-rays 3. Which of the given regions of the electromagnetic spectrum are arranged according to decreasing wavelength? a. X-rays, gamma rays, ultraviolet, infrared b. microwaves, infrared, gamma rays, X-rays c. gamma rays, X-rays, microwaves, radio waves d. radio waves, microwaves, X-rays, gamma rays

2. What is a Electromagnetic Wave?  3. Describe the LEFT side of the electromagnetic spectrum (Radio waves and Micro waves) to me.

A local radio station broadcasts radio waves at 99.7 MHz. Unlike sound, radio waves can pass into outer space, because they are disturbances not in air molecules but in the e-m fields that exist even in the vacuum of space. It's energy traveling independent of matter. a. When that radio wave hits you, how many pulses (wave crests) of em radiation hit you per minute (60 seconds)? (reminder: M = 10 6) b. Radio waves move at the speed of light (c), how far apart is each wave crest (wavelength)? c. If we boosted the signal strength so that station could be heard on the moon, would either the wavelength or frequency change?

6. The earth's ionosphere reflects radio waves with frequencies below 5 MHz. Please estimate the plasma density in the earth's ionosphere.