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The ozone layer absorbs

A. Cosmic rays

B. Infrared rays

C. All radiations of light

D. Ultra violet rays coming from the sun

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  1. When an electric bulb breaks, there la an explosive sound. That is due to
  2. X-rays are
  3. The principle on which a Jet engine works is
  4. If a body is taken from the earth to the moon
  5. The theory that the earth constituted the centre of the universe around which the sun and the planets…
  6. Which of the following is not electromagnetic waves?
  7. Pyrometers are instruments used
  8. A convex mirror always produces
  9. The planet with the reddish tinge is
  10. The mode of travel of heat energy from the sun across the empty space beyond the earth's atmosphere…
  11. Frictional force acts in
  12. The attraction of unlike molecules at the common surface is known as
  13. A man Jumping out of a moving train is thrown
  14. Rays similar to X-rays but of smaller wave length that are given off by radioactive substances are
  15. At temperature near OK, (zero kelvin) metals such as lead and tin become
  16. A light year means
  17. The motion .of the pendulum of a wall clock is an example of
  18. A wire conveying a current deflects a pivoted magnetic needle. This was discovered by
  19. When we sweat, we feel comfortable under a fan because
  20. In a refrigerator cooling is produced by
  21. The Space Application Centre for training in Satellite Communication Technology is located at
  22. The solar wind is composed of
  23. The audible range of a normal human ear is frequencies ranging from
  24. The sun continuously produces an enormous amount of energy. This la due to
  25. Choose the scalar quantity from the following physical quantities
  26. When water is cooled from 4C to 2C its density
  27. The world's first artificial satellite Sputnik I was launched by Russia in
  28. A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left…
  29. A radio set that uses valves does not start operating immediately when it is switched on whereas a set…
  30. The aneroid barometer uses