exam sciencce

• Forms of Electromagnetic Waves

  • Radio waves
  • Microwaves
  • Infrared
  • Visible light
  • Ultraviolet
  • X-rays
  • Gamma rays

  
• Electromagnetic spectrum


  • Arrangement of EM waves in order of increasing frequency

  
• Wavelength


  Distance between crest to crest or trough to trough
• EM waves are bounded at different ranges, meaning each type of EM wave has upper and lower limits on the spectrum
• Electromagnetic spectrum


  • Radio waves
  • Microwaves
  • Infrared
  • Visible light
  • Ultraviolet
  • X-ray
  • Gamma ray
• EM waves are bounded at different ranges. Meaning each type of EM waves has upper and lower limits on the spectrum
• Wavelength ranges of EM waves

  • Radio wave
  • Microwave
  • Infrared
  • Visible light (Red, Orange, Yellow, Green, Blue, Violet)
  • Ultraviolet
  • X-ray
  • Gamma ray
• Infrared was discovered by famous astronomer Sir Frederick William Herschel and has a range of 7x10-7 m – 1x10-3 m
• 1. ray has the least wavelength range of 1 x10-11 m – 1 x10-8 m
• Infrared has the longest wavelength among the EM waves
• Radio wave can travel the farthest distances because it has a wavelength range of greater than 1x10-1 m
• The wavelength of microwaves ranges from 1x10-1 m to 1x10-3 m. Bacteria have size comparable to the wavelength of microwave
• The frequency range of infrared radiation is 3x1011 Hz – 4x1014 Hz
• Visible light with a frequency of 6.3 x1014 Hz is the color red
• 1. ray has the highest frequency among the EM waves
• Radio wave has the least amount of energy among the EM waves
• Gamma ray has the highest frequency and the highest energy
• Changes in EM waves from radio to gamma

  • Wavelength: DECREASING
  • Frequency: INCREASING
  • Energy: INCREASING
• Gamma ray has shorter wavelength than X-ray
• Ultraviolet has higher frequency than visible light
• Infrared has lower energy than radio waves
• Green light has longer wavelength than blue light in the visible spectrum
• Gamma ray has lower frequency than microwave
• The electromagnetic spectrum is the arrangement of electromagnetic waves, which are waves that are created with changing electric field and magnetic field

  
• EM waves travel on vacuum at a constant speed of 3 x108 m/s
• The electromagnetic spectrum is arranged in a manner of increasing wavelength, decreasing frequency and decreasing energy
• Radio wave has the longest wavelength, lowest frequency and lowest energy among all EM waves
• Visible light is the only EM wave that can be seen by our naked eye, and violet has the shortest wavelength and highest frequency in the visible spectrum
• Gamma ray has the shortest wavelength, highest frequency and highest energy among all EM waves
• Gamma ray has the highest ionizing radiation, while radio wave has the lowest ionizing radiation
• James Clerk Maxwell theorized that changing magnetic field will produce electric field
• Electromagnetic waves can travel through a vacuum at a speed of 3 x 108 m/s
• The property that spells the difference between radio wave and microwave radiation is wavelength
• Radio waves and gamma rays lie at the beginning and end of the electromagnetic spectrum
• The frequency range of ultraviolet radiation is 7.5x1014 – 3x1016 Hz
• Visible light with a frequency of 4.5 x1014 Hz is the color yellow
• The correct order from longest to shortest wavelength is: radio wave, infrared, gamma ray
• The wavelength of microwaves is similar to the size of a 1 Peso coin
• Gamma ray has the shortest wavelength range of less than 1x10-11 meters and the highest energy
• Radio wave has the longest wavelength in the electromagnetic spectrum