Frequency Conversion

• AM radio broadcasts use frequencies between 540 kHz and 1600 kHz.
• The human ear can typically hear frequencies between 20 Hz and 20 kHz.
• Visible light has frequencies ranging from about 430 THz to 750 THz.
• Wi-Fi routers typically operate at 2.4 GHz or 5 GHz.
• The human heart beats at a frequency of about 1 Hz to 1.5 Hz at rest.
• 5G cellular networks can use frequencies up to 300 GHz.

Quiz content to be implemented.

• Ancient civilizations observed natural frequencies in music and astronomy.
• In the 17th century, Galileo Galilei studied the frequency of pendulum swings.
• Heinrich Hertz proved the existence of electromagnetic waves in the late 19th century.
• The unit of frequency, the hertz (Hz), was named after Heinrich Hertz in 1930.
• Modern atomic clocks use the frequency of electron transitions to measure time with extreme precision.

• Telecommunications: Radio, TV, mobile phones, and satellite communications
• Medicine: Ultrasound imaging, MRI scanners, and radiation therapy
• Music: Tuning instruments and audio production
• Engineering: Vibration analysis in structures and machines
• Physics: Studying atomic and subatomic particles
• Astronomy: Analyzing light from distant stars and galaxies

Frequency

The number of occurrences of a repeating event per unit of time.

Hertz (Hz)

The SI unit of frequency, defined as one cycle per second.

Wavelength

The distance between successive crests of a wave, inversely proportional to frequency.

Bandwidth

The difference between the upper and lower frequencies in a continuous band of frequencies.

Resonance

The tendency of a system to oscillate with greater amplitude at some frequencies than at others.