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Write down the expression of velocity of...

Write down the expression of velocity of electromagnetic wave in free space.

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BINA LIBRARY-ELEMENTS OF PHYSICS ii-EXERCISE
  1. Which part of the electromagnetic spectrum carries heat energy?

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  2. Name the part of electromagnetic spectrum which is suitable for radar ...

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  3. Write down the expression of velocity of electromagnetic wave in free ...

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  4. What oscillates in electromagnetic waves? Are these waves transverse o...

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  5. Name the characteristics of e.m waves that (i) increases, (ii) remains...

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  6. Write the relationship between amplitudes of electric and magnetic fie...

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  7. Which part of the e.m. spectrum has largest penetrating power?

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  8. Arrange in descending order of wavelength gamma-rays, x-rays and visib...

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  9. Name the e.m. radiations used for studying crystal structure of solids...

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  10. What is the ratio of speed of infra-red rays and ultraviolet rays in v...

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  11. How does a charge 'q' oscillating at certain frequency produce electro...

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  12. Write down the four Maxwell's equations.

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  13. When a boat is moving in the river, does the water offer force of fric...

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  14. What are x-rays? State two important uses of it.

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  15. Explain qualitatively that an e.m. wave can propagate without material...

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  16. What is the wavelength range of gamma-rays ? State two uses of gamma-r...

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  17. State various uses of radiowaves.

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  18. Why does friction increase if the two surfaces are pressed ?

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  19. Give three examples to show that friction is increased deliberately

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  20. What are microwaves?

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