Science 30 January 1999 Grade 12 Diploma Examination

Use the following information to answer the next question.Radio Wave Pattern38. The radio wave above has beenA. internally reflectedB. externally reflectedC. frequency modulatedD. amplitude modulatedUse the following information to answer the next question.Electromagnetic Radiation (EMR) Terms1 Total internal reflection2 Doppler effect3 Emission spectrum4 Radio wavesNumerical Response11. Match the EMR terms, as numbered above, with their uses, as listed below. Use eachnumber only once.Motion of stars _____ (Record in the first column.)Fibre optic cables _____ (Record in the second column.)Composition of stars _____ (Record in the third column.)Cellular phones _____ (Record in the fourth column.)(Record your answer in the numerical-response section on the answer sheet.)27