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What are electromagnetic radiations? Wha...

What are electromagnetic radiations? What is their velocity in vacuum?

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Electromagnetic radiations consist of electric and magnetic fields, oscillating perpendicularly to each other and to the direction of propagation of radiation. Velocity of electromagnetic radiation in vacuum is `3xx10^(8)m*s^(-1)`.
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CHHAYA PUBLICATION-STRUCTURE OF ATOM-WARM UP EXERCISE
  1. Find and total number of electons present in 1 mol methane.

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  2. Mass number of an ion with unit negative charge is 37. Number of neutr...

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  3. What are electromagnetic radiations? What is their velocity in vacuum?

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  4. State the principle of formation of electromagnetic radiation.

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  5. What do you mean by electromagnetic spectrum?

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  6. What are microwaves? Why are they used in radars?

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  7. Arrannge the various types of radiations constituting the electromagne...

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  8. Arrange the following radiations in the order of their increasing freq...

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  9. How would you increase the strength of photoelectric current?

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  10. How are the following effected by the increase in intensity of the inc...

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  11. Bonellia feeds with the help of

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  12. What is photoelectric effect?

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  13. What is black body radiation ?

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  14. Out of red and blue light, which one is associated with photons posses...

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  15. Differentiate betweena quantum and a photon.

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  16. Enegy associated with X-rays is higher than that of visible light-expl...

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  17. Mention the property of electromagnetic radiation (wave nature or part...

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  18. Give examples of production of -(i) photons from electrons (ii) electr...

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  19. (i) Mention the factors affecting the kinetic energy of the photoelect...

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  20. Why are the photoelectric work functions different for differet metals...

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