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Physics Questions and Answers

97. The ozone layer protects us from
 
  • A. ultra violet rays
  • B. radio waves
  • C. visual radiation
  • D. infrared radiation
 
 
98. Mesons are found in
 
  • A. alpha–rays
  • B. laser beam
  • C. cosmic rays
  • D. x–rays
 
99. The process in which heat is transmitted without the aid of the intervening medium is
 
  • A. conduction
  • B. convection
  • C. radiation
  • D. none of these
 
100. The colour of light is determined by the
 
  • A. wavelength
  • B. amplitude
  • C. phase
  • D. velocity