Which of the following is not electromagnetic waves?

A. heat waves

B. sound waves

C. radio waves

D. light waves

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. X-rays are used
  2. When a whistling engine approaches a person standing on the platform, the frequency or the note
  3. An electric charge is measured in
  4. Which of the following sets of elementary particles have nearly equal masses?
  5. Sound travels fastest in
  6. The air inside an electric, bulb is removed to prevent
  7. The extremely luminous objects located at the centre of some distant galaxies and which are sources…
  8. The force of attraction or repulsion between two charged bodies is directly proportional to the product…
  9. A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water…
  10. To produce beats it is necessary to have two waves
  11. Like magnetic poles
  12. Where does the centre of gravity of a rubber ring lie?
  13. One can be recognised by his voice alone due to the factor of
  14. The attraction of unlike molecules at the common surface is known as
  15. The distance between two bodies is halved. Now the force of attraction between them will be
  16. The solar wind is composed of
  17. In a river, the currents are fastest where the river la
  18. A tube light works on the principle of
  19. Compared to the atomic bomb, the destructive power of a hydrogen bomb is
  20. Lightning conductors are made of
  21. What la the minimum velocity required for a rocket to overcome earth's gravity and travel into space?
  22. The sun continuously produces an enormous amount of energy. This la due to
  23. Astigmatism, a structural defect of the eye, is due to
  24. Out of the following which is an insulator?
  25. The image of an object formed in a plane mirror
  26. An ohm is a unit of
  27. Of the following types of electromagnetic radiation which has the longest wavelength?
  28. The velocity of sound in air increases with
  29. Skating on ice is possible because
  30. The coil of an electric heater is made of