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Electromagnetic Waves

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flashcards for study of electromagnetic waves

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Electromagnetic Waves

  1. 1. Gamma Rays X Rays Ultraviolet Rays Visible Light: Green WAVES: 0.0001 nm WAVES: 0.01 nm- 10 nm WAVES: 10 nm- 400 nm WAVES: 550 nm -Smallest wavelength -Most energy -Radioactive atoms & nuclear explosions -Earth’s atmosphere shields us -Dense materials (bone, metal) absorb these, leaving a ‘shadow’ on film -Earth’s atmosphere shields us -While humans cannot, some insects- bumblebees can see them -responsible for sunburn - Part of the visible light spectrum that humans can see
  2. 2. Infrared Visible Light: Violet Radio Waves: Radar, TV, AM, FM Visible Light: Blue WAVES: 400 nm WAVES: 1,000 nm- 0.01 cm WAVES: 1 cm – 1 m WAVES: 500 nm Longest wavelength Least energy -radio, tv, cell phone waves -range from the size of cells to a pin head -pin head sized infrared waves are thermal: our temperature-sensing nerve cells can detect these waves as heat -smaller, cell-sized infrared waves are NOT thermal: tv remote control -animals like the pit viper can ‘see; infrared - Part of the visible light spectrum that humans can see - Part of the visible light spectrum that humans can see
  3. 3. Visible Light: Yellow Visible Light: Orange Visible Light: Red WAVES: 650 nm WAVES: 600 nm WAVES: 750 nm Visible Light: white -when all visible light wave lengths are seen -cones in our eyes absorb these waves -we see the refection of these waves off of objects when we see the object’s color -we are blind to some wavelengths of color WAVES: 400 nm- 750 nm - Part of the visible light spectrum that humans can see - Part of the visible light spectrum that humans can see - Part of the visible light spectrum that humans can see
  4. 4. Micro Waves: WAVES: 30 cm -radar: radio detection and ranging -waves close to a foot long cook food in a microwave -shorter, cm long microwaves used in phone towers -transmit information through fog/rain -cosmic background radiation from the Big Bang has been discovered!

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