2.What are the different bands of radio waves arranged according to decreasing frequency range? 3. How do you describe the frequency range and wavelength range of radio wave bands used in FM radio broadcasting? 4. You usually listen to local news and dramas in AM radio and listen to music in FM radio. What is the meaning of AM and FM in radio broadcasting? How do they differ? 5. Scan the tuner of your transistor radio, stereo and identify radio stations that operate in AM and FM band. Name the radio stations and the frequency that they operate. Name of Radio Stations AM Band FM Band Frequency
Answer (1)
2. Different Bands of Radio Waves (Decreasing Frequency Range)1. Extremely High Frequency (EHF): 30 GHz to 300 GHz2. Super High Frequency (SHF): 3 GHz to 30 GHz3. Ultra High Frequency (UHF): 300 MHz to 3 GHz4. Very High Frequency (VHF): 30 MHz to 300 MHz5. High Frequency (HF): 3 MHz to 30 MHz6. Medium Frequency (MF): 300 kHz to 3 MHz7. Low Frequency (LF): 30 kHz to 300 kHz8. Very Low Frequency (VLF): 3 kHz to 30 kHz9. Ultra Low Frequency (ULF): 300 Hz to 3 kHz3. Frequency and Wavelength Range of FM Radio BroadcastingFrequency Range: FM radio typically operates in the VHF band, specifically from 88 MHz to 108 MHz.Wavelength Range: The corresponding wavelength for FM frequencies can be calculated using the formula:88 MHz: Wavelength ≈ 3.4 meters108 MHz: Wavelength ≈ 2.8 meters4. Meaning and Difference between AM and FMAM (Amplitude Modulation): In AM broadcasting, the amplitude of the radio wave is varied to encode the audio signal. This allows for long-range transmission, but it is more susceptible to noise and interference.FM (Frequency Modulation): In FM broadcasting, the frequency of the radio wave is varied to transmit audio signals. FM provides better sound quality and resistance to interference, making it suitable for music.
