The human eye is sensitive to electromagnetic radiation in the frequency range of approximately 430 to 790 terahertz (THz), corresponding to wavelengths between 390 and 700 nanometers.
This range defines the visible spectrum, encompassing all the colors we can see.
In terms of hearing, humans typically perceive sounds between 20 hertz (Hz) and 20,000 Hz (20 kHz).
However, this range can vary among individuals and tends to decrease with age, especially at higher frequencies.
Beyond these natural limits, the electromagnetic spectrum includes frequencies such as ultraviolet, infrared, X-rays, and gamma rays, which are invisible to the naked eye.
Similarly, the acoustic spectrum extends to infrasound (below 20 Hz) and ultrasound (above 20 kHz), which are inaudible to humans.
Advanced technologies like infrared cameras, ultraviolet sensors, and ultrasonic detectors enable us to observe and study these otherwise imperceptible phenomena.
This range defines the visible spectrum, encompassing all the colors we can see.
In terms of hearing, humans typically perceive sounds between 20 hertz (Hz) and 20,000 Hz (20 kHz).
However, this range can vary among individuals and tends to decrease with age, especially at higher frequencies.
Beyond these natural limits, the electromagnetic spectrum includes frequencies such as ultraviolet, infrared, X-rays, and gamma rays, which are invisible to the naked eye.
Similarly, the acoustic spectrum extends to infrasound (below 20 Hz) and ultrasound (above 20 kHz), which are inaudible to humans.
Advanced technologies like infrared cameras, ultraviolet sensors, and ultrasonic detectors enable us to observe and study these otherwise imperceptible phenomena.
The human eye is sensitive to electromagnetic radiation in the frequency range of approximately 430 to 790 terahertz (THz), corresponding to wavelengths between 390 and 700 nanometers.
This range defines the visible spectrum, encompassing all the colors we can see.
In terms of hearing, humans typically perceive sounds between 20 hertz (Hz) and 20,000 Hz (20 kHz).
However, this range can vary among individuals and tends to decrease with age, especially at higher frequencies.
Beyond these natural limits, the electromagnetic spectrum includes frequencies such as ultraviolet, infrared, X-rays, and gamma rays, which are invisible to the naked eye.
Similarly, the acoustic spectrum extends to infrasound (below 20 Hz) and ultrasound (above 20 kHz), which are inaudible to humans.
Advanced technologies like infrared cameras, ultraviolet sensors, and ultrasonic detectors enable us to observe and study these otherwise imperceptible phenomena.
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