Cosmic noise is caused by—

Q. Cosmic noise is caused by—

1. Lightning discharges
2. Solar eruptions
3. Distant stars
4. Industrial discharges

Answer: Distant stars

Cosmic noise is caused by distant stars

Noise

In electronics, noise is an unwanted disturbance in an electrical signal. Noise generated by electronic devices varies greatly as it is produced by several different effects.

In electronics, noise is a random fluctuation in an electrical signal. This happens in all electronic circuits. Noise made by electronic devices varies greatly. In communication systems, noise is an error or random disturbance of useful information in a communication channel.

Types of Noise in the Communication system:

1. Noise types
1. Thermal noise
2. Shot noise
3. Flicker noise
4. Burst noise
5. Transit-time noise
2. Coupled noise
1. Sources
2. Mitigation

Cosmic Noise

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Cosmic noise and galactic radio noise is random noise that originates outside the Earth's atmosphere. It can be detected and heard in radio receivers. Cosmic noise characteristics are similar to those of thermal noise. Cosmic noise is experienced at frequencies above about 15 MHz when highly directional antennas are pointed toward the sun or to certain other regions of the sky such as the center of the Milky Way Galaxy.

Cosmic Noise. the electrical fluctuations in a receiving antenna that are due to the radio radiation of the sun, the stars, the planets, interstellar media, and other matter. Regardless of its origin, cosmic noise manifests itself in radio reception in the same manner as thermal noise.