AM (amplitude modulation) and FM (frequency modulation) radio waves are both forms of electromagnetic radiation. The main difference between the two is how the information (music, speech, etc.) is encoded onto the wave. AM radio waves are modulated by varying the amplitude (or strength) of the wave, while FM radio waves are modulated by varying the frequency (or number of waves) of the wave.
In terms of passing through glass, both AM and FM radio waves can pass through glass, but they behave differently. Glass is a good conductor of electricity, meaning that it can absorb and reflect electromagnetic waves. However, the extent to which it does this depends on the wavelength (or size) of the wave.
AM radio waves have a longer wavelength compared to FM radio waves. This means that they have a lower frequency and can pass through objects, like glass, more easily. FM radio waves, on the other hand, have a shorter wavelength and a higher frequency, making them more likely to be absorbed or reflected by objects like glass.
This can be demonstrated through a simple experiment. Take a small AM radio and tune it to a station with a strong signal. Place the radio near a window and notice that the signal remains strong, even when the window is closed. This is because the longer wavelength of AM radio waves can easily pass through the glass.
Next, try the same experiment with an FM radio. Tune it to a station with a strong signal and place it near a window. You will likely notice that the signal becomes weaker when the window is closed. This is because the shorter wavelength of FM radio waves is more likely to be absorbed or reflected by the glass, resulting in a weaker signal.
In conclusion, AM radio waves can pass through glass better than FM radio waves due to their longer wavelength. This can be shown through a simple experiment using a radio and a window.
