Galaxies emit

A. radio waves and X-rays

B. ultraviolet light waves

C. visible light waves

D. All the above

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  1. Holography is the technique of
  2. Which of the following sets of elementary particles have nearly equal masses?
  3. The audible range of a normal human ear is frequencies ranging from
  4. Fish and other aquatic creatures can live inside a deep frozen pond because
  5. Which of the following rays has the highest penetrative power?
  6. Tea pots are highly polished
  7. A cyclist leans inwards when he is negotiating a curve 10 that
  8. The coil of an electric heater is made of
  9. Photoelectric cell is a device which converts
  10. Where does the centre of gravity of a rubber ring lie?
  11. A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps
  12. An electric charge is measured in
  13. The planet that has got a well-developed set of rings is
  14. The resistance of a wire depends on
  15. It is difficult to bon potatoes at the top or a mountain because
  16. Photo-electric cells convert
  17. A person does not sink in the Dead Sea because
  18. At what temperature do the Fahrenheit and Kelvin scales give the same reading?
  19. The electron has a mass equal to
  20. Two tumblers stuck together can be separated by
  21. Expansion of a rod when heated
  22. A convex mirror always produces
  23. The planet that is known as earth's twin is
  24. Which physical quantity is measured in watts
  25. The following are the atmospheric zones above the surface of the earth:A) Troposphere B) IonosphereC)…
  26. A light year means
  27. For viewing objects placed at a higher level from a position at a lower level, the instrument used'…
  28. Which of the following is wrongly matched?
  29. Moon has no atmosphere because
  30. When a charged rod is brought near a collection of small pith balls, the balls