The mode of travel of heat energy from the sun across the empty space beyond the earth's atmosphere is known as

A. conduction

B. convection

C. radiation

D. absorption

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  1. One can be recognised by his voice alone due to the factor of
  2. The mixing up of two gases as a result of random motion of molecules is called
  3. The period of oscillation of a simple pendulum depends upon
  4. Rays similar to X-rays but of smaller wave length that are given off by radioactive substances are
  5. The coil of an electric heater is made of
  6. For accurate scientific work, temperatures are often measured by
  7. When one enters a dark room after being in bright light one is not able to see anything clearly for…
  8. A light year means
  9. We see the flash of lightning before hearing the thunder because
  10. Nichrome is used in electric heaters and irons because
  11. The strength of an electromagnet can be increased by
  12. A heavenly body similar in nature to the sun intensely hot glowing mass that produces its energy by…
  13. If you want a sound proof room, the walls should be
  14. The red colour of the setting sun is due to
  15. One finds it more difficult to walk on ice than on a concrete road because
  16. The filament used in the electric lamp is made of
  17. The colour of the light which travels through glass with minimum speed is
  18. We always see only one side of the moon because
  19. SONAR (Sound Navigation Ranging) is
  20. A tube light works on the principle of
  21. At what temperature do the Fahrenheit and Kelvin scales give the same reading?
  22. The ballistic missile, Agni 11, tested by India has a maximum range of
  23. Mercury is used in a barometer because
  24. The rate of cooling of a hot body depends on
  25. When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light…
  26. A piece of cork la embedded inside an ice block which floats in water. What will happen to the level…
  27. The temperature of a large bucket-full of hot water (a few degrees below boiling point) is lower than…
  28. When are temperature resistance
  29. Railway tracks are banked on curves so that
  30. Heat transfer