What are PULSARS?
admin Those sources which have the power to emit the radio signals after fixed time intervals. The discovery of the PULSAR was not done by a single person. It was a…
What are Star Clusters?
In galaxies there are small groups of stars. These small groups of stars present inside a galaxy are known as star clusters. Two types of clusters are there:- 1. Globular…
What is Hubble’s Law? Explain Red Shift of Galaxies.
To study the Hubble’s law we have to study the Red Shift first. Red Shift: From the studies it was found that the spectrum automatically bends towards the red end…
Explain the various theories of the origin of Universe?
There are three main theories :- 1. The Steady State Theory 2. The Big Bang Theory 3. The Pulsating Theory The Steady Sate theory: It states that the counting of…
Important Facts About Universe
• The stars having zero magnitude will be less bright than the stars having negative magnitudes. • Those stars which are red in color will have less temperature than the…
What is Communication?
Communicate means to exchange information between each other. There are lots of ways available through which we can communicate with each other. These are speech, gestures etc. Basically long distance…
What is Modulation?
Modulation is a process in which the audio signal having very low frequency is put on a sine wave having frequency higher than that of the audio signal. The equation…
What is Amplitude modulation?
Amplitude modulation is the process in which instantaneous amplitude of audio frequency is directly proportional to the amplitude of the high frequency carrier wave. Formula used to calculate the depth…
What is Frequency Modulation?
In frequency modulation the variation in frequency of the carrier wave happens due to the instantaneous value of the modulating voltage. In this case the amplitude is made constant. The…
What is the difference between Amplitude modulation and frequency modulation?
1. In case of frequency modulation the change in amplitude may be due to noise. If we make use of amplitude limiters in FM receivers then we can completely vanish…