Understanding AM and FM Radio Waves

What does AM stand for in radio broadcasting?

• Amplitude Multiplexing

• Analog Modulation

• Audio Modulation

• Amplitude Modulation

How is information transmitted in FM radio?

• By changing the amplitude of the wave

• By changing the frequency of the wave

• By changing the phase of the wave

• By changing the speed of the wave

What is the typical range of FM radio waves?

• 100 to 200 miles

• 10 to 20 miles

• 50 to 100 miles

• 30 to 50 miles

Why can AM radio waves travel farther at night?

• They are less prone to interference

• They can bounce off the ionosphere

• They have higher power at night

• They are less affected by obstacles

What happens to high-frequency waves when they encounter the ionosphere?

• They are scattered

• They are absorbed

• They pass through

• They are reflected