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Light can travel in vacuum whereas sound...

Light can travel in vacuum whereas sound can not do so. Why?

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The correct Answer is:
Sound waves need material particles to propagate.
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FIITJEE-ELECTROMAGNETIC WAVE & WAVE OPTICS-ASSIGNMENT PROBLEMS(Subjective: Level-I)
  1. The amplitude of the magnetic field part of harmonic electromagnetic w...

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  2. A charged particle oscillates about its mean equilibrium position with...

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  3. Give the ratio of velocities of light rays of frequencies 5 xx 10^(12)...

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  4. Find the ratio of frequencies of light waves of wavelengths 4000 A and...

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  5. What is Maxwell displacement current?

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  6. Light can travel in vacuum whereas sound can not do so. Why?

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

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  8. What is the role of ozone layer in atmosphere?

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  9. Is the phenomenon of diffraction exhibited by all polarised, unpolaris...

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  10. Name the phenomenon which enable us to distinguish between transverse ...

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  11. Fraunhofer's lines are due to which phenomenon?

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  12. Both light and sound waves suffer diffraction. Why it is more difficul...

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  13. What is the polarising angle for glass?

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  14. A ray of light-is incident on glass at the polarising angle ip. Find t...

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  15. (i)Draw the type of wave-front that corresponds to a beam of white lig...

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  16. What is the shape of a wavefront when (a) light is emitted by a point...

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  17. Describe what happens to the Fraunhofer single slit diffraction patter...

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  18. At what angle should the axes of two polaroids be placed so as to redu...

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  19. A parallel beam of monochromatic light of wavelength 450 m passes thro...

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  20. For a diven medium, the polarising angle is 60^(@). What will be the c...

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