Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Ch 4 Physics

### Electromagnetic Energy

Question | Answer |
---|---|

What are the electromagnetic properties? | frequency, wavelength, velocity, amplitude |

What formulas are used to describe how electromagnetic energy behaves? | wave equation, inverse square law |

A field or state of energy found all around us. Also found in x-rays, radiowaves, microwaves, and visible light is called: | electromagnetic energy |

An uninterrupted (continuous) ordered sequence of energy that exist over a wide range. | continuum |

The smallest quantity of any type of electro-magnetic energy. | photon |

The photon, a small bundle of energy that travels through space at the speed of light, is also referred to as a: | quantum |

Velocity, or speed of light, is equal to what? | 186,000 miles per second |

What is the SI unit for velocity (speed of light)? | 3 x 10^8 m/s |

Do photons have mass? | no |

Do photons have electrical and magnetic fields? | yes |

A variation in the movement of photons in electrical and magnetic fields. | sinewave |

The gravitational field that governs the interaction of electrostatic charges is the: | electric field |

The gravitational field that governs the interaction of magnetic poles is the: | magnetic field |

Oscillation of electricity in both directions within a conductor. | alternating current |

Flow of electricity in one direction within a conductor. | direct current |

One-half the range from crest to valley over which the sine wave varies refers to the: | amplitude |

The number of wavelengths that pass a point of observation per second; rate of rise and fall. | frequency |

What is the measurement of frequency? | hertz (Hz) |

The distance form one crest to another, from one valley to another, or from any point on the sine wave to the next corresponding point. | wavelength |

The three wave parameters needed to describe electromagnetic energy are: | velocity, frequency, wavelength |

Created by:
Beverly Jo Miller-Cox
on 2010-02-24