
What are carrier waves? Why do we need the carrier waves of high frequency for distant communication?
Answer
502.2k+ views
1 likes
Hint: Carrier waves are electromagnetic waves that travel with the velocity of light and do not require a material medium to propagate.
Complete step by step answer:
A carrier wave is an electromagnetic wave that is modulated in amplitude or frequency to carry a signal. As a carrier wave is an electromagnetic wave, it travels with the velocity of light and with constant amplitude. It is used to carry signals from one location to another on the surface of earth. We need the carrier waves of high frequency for distant communication because high frequency carrier waves travel with the speed of light and do not require a material medium to propagate. So, such types of waves are not obstructed by the earth's atmosphere.
Note:
An electric field changing with time in a region produces a magnetic field in that region. The variations in electric field and magnetic field are perpendicular to each other. These disturbances have the properties of waves and can travel in space even without any material medium and are called electromagnetic waves. There is a need for transmission of electromagnetic waves at high frequencies. This is achieved by the process of modulation, wherein we superimpose the audio frequency waves on a high frequency carrier wave. The resultant wave is called the modulating wave. The carrier wave may be a continuous or sinusoidal wave or can be a pulse, which is discontinuous.
Complete step by step answer:
A carrier wave is an electromagnetic wave that is modulated in amplitude or frequency to carry a signal. As a carrier wave is an electromagnetic wave, it travels with the velocity of light and with constant amplitude. It is used to carry signals from one location to another on the surface of earth. We need the carrier waves of high frequency for distant communication because high frequency carrier waves travel with the speed of light and do not require a material medium to propagate. So, such types of waves are not obstructed by the earth's atmosphere.
Note:
An electric field changing with time in a region produces a magnetic field in that region. The variations in electric field and magnetic field are perpendicular to each other. These disturbances have the properties of waves and can travel in space even without any material medium and are called electromagnetic waves. There is a need for transmission of electromagnetic waves at high frequencies. This is achieved by the process of modulation, wherein we superimpose the audio frequency waves on a high frequency carrier wave. The resultant wave is called the modulating wave. The carrier wave may be a continuous or sinusoidal wave or can be a pulse, which is discontinuous.
Recently Updated Pages
Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Master Class 11 English: Engaging Questions & Answers for Success

Master Class 11 Maths: Engaging Questions & Answers for Success

Trending doubts
The flightless birds Rhea Kiwi and Emu respectively class 11 biology CBSE

Difference Between Prokaryotic Cells and Eukaryotic Cells

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

1 Quintal is equal to a 110 kg b 10 kg c 100kg d 1000 class 11 physics CBSE

Net gain of ATP in glycolysis a 6 b 2 c 4 d 8 class 11 biology CBSE
