Electromagnetic Spectrum || for Class 12 in Hindi

In this Physics video in Hindi for Class 12 we explained what electromagnetic spectrum is and what are the different radiations are associated with it. We also explained the different ways of the production of electromagnetic waves and their usage. This topic is from Chapter 8 : 'Electromagnetic Waves' for Class 12 from NCERT.
The classification of electromagnetic waves according to frequency/wavelength is known as the electromagnetic spectrum.
But, there is no sharp division between one kind of wave and the next. The classification is based roughly on how the waves are produced and/or detected.
Processes of production of electromagnetic waves :
1. Accelerated motion of charges in conducting wires
2. Special devices, such as, klystrons, magnetrons, Gunn diodes etc.
3. Hot bodies and molecules
4. Electrons moving to lower energy level
5. Metal bombarded with high energy electrons
6. Nuclear reaction
Radio Waves :
Source : Accelerated motion of charges in conducting wires.
Usage : used in radio and television communication systems.
Microwaves :
Source : Special devices (klystrons, magnetrons, Gunn diodes etc.)
Usage : Radar systems, Microwave ovens
Infrared :
Source : Hot bodies and molecules
Usage : TV remote controller, Wi-fi system. It maintains earth’s warmth
Visible light :
Source : Electron’s jump to lower energy level. Sun, lamps are common sources of visible light.
Ultraviolet :
Source : Electron’s jump to very lower energy level (inner shell). Sun, welding arcs, UV lamps, mercury vapour lamps are some common sources of ultraviolet radiation.
X-rays :
Source : Bombarding a metal target by high energy electrons.
Usage : X-ray photography (radiography), treatment of cancer.
Gamma rays :
Source : Nuclear reactions.
Usage : Destroy cancer cells.
👇👇👇👇👇👇👇👇👇 𝑷𝒍𝒂𝒚𝒍𝒊𝒔𝒕 👇👇👇👇👇👇👇👇👇
🔴 ELECTROMAGNETIC WAVES - FULL CHAPTER 🔴 Class 12 - Physics
• Physics 12th : Electro...
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[@wastman9762]

This classification of EM waves is based on wavelength and frequency in vaccum or air. Right? As wavelength and so do speed changes in other mediums. And whether all em waves have same speed in certain medium such as glass or water or they vary?

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This is important for Optics Study.❤❤❤

[@user-qz5uj5zi6i]

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[@SubhajitMandalphysics369]

Sir plz upload what metter wave
In quantum mechanics for bsc
Is it only probability wave
I think it is a probability for x for any exprent
But why we say associated wave for a particle
I think it is nothing but finding of X value for large times experiment and when we put the value in the graph page we see a weve pattern
Is it right or wrong please upload video about it

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I think 🤔🤔 helpful 😀😀🙂 hogi aapki vedios hamare liye

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amazing lecture 👌🏻👌🏻 ... just a single doubt ... how is that infrared rays relevant with wi fi sytem as mentioned ... could you plzz explain that ?

[@arshfarooqui6841]

Plzzz make a video on 12th Chemistry coordination compounds

[@dipeshyadav9568]

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[@edupoint.physics]

🙏

[@uzmainamdar133]

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[@Mr_LK_]

Please explain Rotational Dynamics Of BSc

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Why moon doesn't fall on the earth...?
How the moon or earth as well as sun gained so huge velocity.....?

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❤

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👍

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Could you make videos on diffraction & interference as the present videos are too old

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First

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gyan is directly proportional to less number in exam

[@edupoint.physics]

Nope....
Not always...

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[@SatyamKumar-nk1uq]

What is your doubt

[@farmanbeg9199]

Sir kya hum mathematically ye dikha sakte ki light ek transversal wave hai sir meri textbook ma hai but meri samajh na aa raha sir aap is par video bana dete to samj aa jata muje

[@edupoint.physics]

Farman Beg,
I have already answered that to you.
Polarisation of light indicates that it is a transverse wave.

[@farmanbeg9199]

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[@edupoint.physics]

Shall try....

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Class 12th k