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Which of the following statements is/are correct regarding the communication systems?
Optical communication systems are smaller in size, weight and require less power, as compared with the radio instruments.
Laser uses infrared light and has a shorter wavelength than the radio waves.
Select the correct answer using the code given below:
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statements is/are correct regarding the commun...
Statement 1: Optical communication systems are smaller in size, weight, and require less power, as compared with radio instruments.
Explanation:
- Optical communication systems use light signals to transmit information, whereas radio instruments use radio waves.
- Light signals have a much shorter wavelength than radio waves, which allows for higher bandwidth and faster data transmission rates.
- Due to the shorter wavelength, optical communication systems can use smaller components such as fiber optics and smaller transmitters and receivers.
- These smaller components result in smaller overall system size and weight.
- Additionally, optical communication systems require less power to transmit signals over long distances compared to radio instruments.
- This is because light signals experience less attenuation (loss of signal strength) in optical fibers compared to radio waves in the atmosphere.
- Therefore, statement 1 is correct.
Statement 2: Laser uses infrared light and has a shorter wavelength than radio waves.
Explanation:
- A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
- Lasers can emit light at various wavelengths, including visible light, infrared light, and ultraviolet light.
- In the context of optical communication systems, lasers are commonly used to generate infrared light.
- Infrared light has a longer wavelength than visible light but a shorter wavelength than radio waves.
- Radio waves have wavelengths ranging from several millimeters to hundreds of meters, whereas infrared light has wavelengths ranging from several micrometers to several hundred nanometers.
- Therefore, statement 2 is incorrect as it states that a laser has a shorter wavelength than radio waves, whereas in reality, lasers produce light with a shorter wavelength than radio waves but longer than visible light.
Conclusion:
- Based on the explanations provided above, statement 1 is correct, and statement 2 is incorrect.
- Therefore, the correct answer is option 'C' - Both 1 and 2.
Explanation:
- Optical communication systems use light signals to transmit information, whereas radio instruments use radio waves.
- Light signals have a much shorter wavelength than radio waves, which allows for higher bandwidth and faster data transmission rates.
- Due to the shorter wavelength, optical communication systems can use smaller components such as fiber optics and smaller transmitters and receivers.
- These smaller components result in smaller overall system size and weight.
- Additionally, optical communication systems require less power to transmit signals over long distances compared to radio instruments.
- This is because light signals experience less attenuation (loss of signal strength) in optical fibers compared to radio waves in the atmosphere.
- Therefore, statement 1 is correct.
Statement 2: Laser uses infrared light and has a shorter wavelength than radio waves.
Explanation:
- A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
- Lasers can emit light at various wavelengths, including visible light, infrared light, and ultraviolet light.
- In the context of optical communication systems, lasers are commonly used to generate infrared light.
- Infrared light has a longer wavelength than visible light but a shorter wavelength than radio waves.
- Radio waves have wavelengths ranging from several millimeters to hundreds of meters, whereas infrared light has wavelengths ranging from several micrometers to several hundred nanometers.
- Therefore, statement 2 is incorrect as it states that a laser has a shorter wavelength than radio waves, whereas in reality, lasers produce light with a shorter wavelength than radio waves but longer than visible light.
Conclusion:
- Based on the explanations provided above, statement 1 is correct, and statement 2 is incorrect.
- Therefore, the correct answer is option 'C' - Both 1 and 2.
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Community Answer
Which of the following statements is/are correct regarding the commun...
- Recently, NASA launched its new Laser Communications Relay Demonstration (LCRD) – the agency’s first-ever laser communications system – from Cape Canaveral Space Force Station in Florida. The LCRD will help the agency test optical communication in the space.
- Currently, most NASA spacecrafts use radio frequency communications to send data. Optical communications will help increase the bandwidth 10 to 100 times more than the radio frequency systems. Laser communications and radio waves use different wavelengths of light. Laser uses infrared light and has a shorter wavelength than the radio waves. This will help the transmission of more data in a short time. According to a release from NASA: “It would take roughly 9 weeks to transmit a completed map of Mars back to the Earth with current radio frequency systems. With lasers, we can accelerate that to about nine days.”
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Which of the following statements is/are correct regarding the communication systems? Optical communication systems are smaller in size, weight and require less power, as compared with the radio instruments. Laser uses infrared light and has a shorter wavelength than the radio waves. Select the correct answer using the code given below:a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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