Radio Wave
Radio Wave
The German physicist, Heinrich Hertz, first applied the theory given by Maxwell to prove the existence of radio waves in 1887. Television and radio networks transmit a signal using radio waves. The introduction of radio and television has had a profound impact on many aspects of society and culture, particularly on the humanities.
Different wavelengths of radio waves have different properties an dare used for different purposes. The main types of electromagnetic waves used in communication are:
Microwaves are useful for 'line-of-sight' Communications where the transmitter can point directly at the receiver. Since microwaves can pass straight through Earth's atmosphere, they can also be used for transmissions between Earth and Communication satellites. space satellite.
In comparison, short-wave radio signals can be transmitted long distances around the globe. This is because they are reflected by the ionosphere, which is a layer of the atmosphere 75-100 km above Earth's surface. short-wave radio signals are beamed upwards at an angle, they can bounce back and forth between Earth ionosphere to be detected tar away from where the transmitter is located. audio signal Similarly, long radio waves are used for communications because they bend around the Earths surface when transmitted.
Radio Waves are also produced naturally. Objects in space, such as stars. emit radio waves. Because microwaves can pass straight through Earth's atmosphere, they can also be used for transmission between Earth and communication satellites.AM and FM Radio:
Each radio station broadcasts its signals using a carrier wave which has a frequency that is specific to that Station. Typically AM signals are transmitted at lower frequencies than FM signals. AM and FM signals also use different methods to encode the music being transmitted.
AM stands for Amplitude Modulation which means the audio signal is used to change (or modulate) the amplitude of the carrier wave. In an FM (Frequency Modulation) system, the audio signal is used to change the frequency of the carrier wave. When you tune your radio receiver to a particular station. you set it to detect the frequency of the carrier wave. Complex circuitry inside your receiver subtracts the carrier wave from the modulated radio waves, leaving only the original audio signal. The full process of radio transmission is summarised.
How can you see radio waves? | |||
| Right Option : B | |||
| View Explanation | |||
The examples of radio waves are ________________. | |||
| Right Option : D | |||
| View Explanation | |||
How did Radio affect society? | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
Barkha Arora
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
Sharandeep Singh
7thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
