The wavelength of the sound wave becomes longer as the car moves away. A longer wavelength means that not as many wave cycles can pass in a given time interval, so the frequency is lower, and thus the pitch of the sound is much lower .
Read moreWhat is spectrum and why is it important?
Spectrum is a range of electromagnetic radio frequencies used for transmission of voice, data and images . Mobile telecom operators send and receive frequencies to enable communication between two phones. The defence services and railways also use the spectrum .
Read moreWhich part of the spectrum is used for communication?
Radio waves are used for communication such as television and radio. Radio waves are transmitted easily through air. They do not cause damage if absorbed by the human body, and they can be reflected to change their direction. These properties make them ideal for communications.
Read moreWhat are the 7 different wavelengths of light?
The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays .
Read moreWhat is the visible spectrum describe?
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye . Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 380 to about 750 nanometers.
Read moreWhat is the visible light spectrum in order?
From longest to shortest wavelength, they are: red, orange, yellow, green, blue, indigo, and violet .
Read moreWhat type of spectrum is visible light?
What is the visible light spectrum? The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view. More simply, this range of wavelengths is called visible light. Typically, the human eye can detect wavelengths from 380 to 700 nanometers.
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