Presentation on theme: "Electromagnetic Spectrum"— Presentation transcript:
1Electromagnetic Spectrum Chapter 18 Study GuideElectromagnetic Spectrum
2B. Wavelength and frequency Electromagnetic Waves vary inA. the speed they travel in a vacuumB. Wavelength and frequencyC. the way they reflectD. Their direction
3A. wavelengthTo calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and itsA. wavelengthB. IntensityC. RefractionD. Amplitude
4C. both wave and a particle Light acts likeA. A waveB. A particleC. both wave and a particleD. neither a wave nor a particle.
5B. a stream of particlesBecause light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light isA. radiationB. a stream of particlesC. a waveD. heat
6d. Farther from the source, photons spread over a larger area. Which of the following occurs as light travels farther from its source?a. Far from the source, photons spread through a small area.b. The intensity of light increases as photons move away from the source.c. The source gives off less light as photons move away from it.d. Farther from the source, photons spread over a larger area.
7c. radio waves. Infrared rays have a shorter wavelength than a. ultraviolet rays.c. radio waves.b. X-rays.d. gamma rays.
8c. the electromagnetic spectrum. The full range of frequencies of electromagnetic radiation is calleda. visible light.c. the electromagnetic spectrum.b. radio waves.d. invisible radiation.
9b. radio waves.The waves with the longest wavelengths in the electromagnetic spectrum area. infrared rays. c. gamma rays.b. radio waves. d. X-rays.
10c. infrared rays and ultraviolet rays. The visible light spectrum ranges betweena. radar waves and X-rays.c. infrared rays and ultraviolet rays.b. television waves and infrared rays.d. ultraviolet rays and gamma rays.
11d. microwaves. Cellular telephones utilize a. radar waves. c. very low frequency waves.b. very high frequency waves.d. microwaves.
12b. as dark, highly exposed areas. X-ray photographs show softer tissuea. as invisible.c. the same as dense bones.b. as dark, highly exposed areas.d. as bright white areas.
13a. scatters some light. A translucent material a. scatters some light. c. absorbs all light.b. transmits all light.d. reflects all light.
14c. opaque-translucent-transparent In order of the light-transmitting capabilities of materials from none to all, which is the correct sequence?a. transparent-opaque-translucentc. opaque-translucent-transparentb. opaque-transparent-translucentd. translucent-transparent-opaque
15b. refractionWhich of the following occurs as a light wave bends when it passes from one medium into another?a. constructive interferencec. destructive interferenceb. refractiond. reflection
16c. all the colors of the visible spectrum. Newton’s prism experiments showed that white sunlight is made up ofa. the full electromagnetic spectrum.c. all the colors of the visible spectrum.b. only blue light when separated by a prism.d. only the longest wavelengths.
17d. dispersion.When droplets of water in the atmosphere act like prisms, the colors in sunlight undergoa. interference. c. polarization.b. absorption. d. dispersion.
18a. color of the object.What an object is made of and the color of light that strikes it determines thea. color of the object.c. opacity of the object.b. transparency of the object.d. translucence of the object.
19d. blue, green, and red. The primary colors of light are a. green, blue, and black.c. red, yellow, and blue.b. cyan, magenta, and yellow.d. blue, green, and red.
20c. sodium-vapor lights.Many streets and parking lots are illuminated witha. laser lights.c. sodium-vapor lights.b. tungsten-halogen lights.d. fluorescent lights.
21transverseElectromagnetic waves are ____________________ waves consisting of changing electric and magnetic fields.
22infraredWarm objects give off more ____________________ radiation than cool objects give off.
23300,000,000The speed of light in a vacuum is ____________________ m/s.
24redWhen viewed in red light, an object that reflects all the colors of light will appear ____________________.
25vacuumElectromagnetic waves can travel through a(an) ____________________.
26wavelengthsVisible light waves have a shorter ____________________ than infrared waves have.
27gammaThe electromagnetic waves with the shortest wavelengths are ____________________ rays.
28frequency wavelengthWhite light passing through a prism separates into colors because of the differences in the ____________________ of each color of light.
29Visible lightThe following electromagnetic waves are arranged in order of increasing frequency: infrared, _________________________, ultraviolet.
30Electromagnetic waves are transverse and sound waves are longitudinal What is a basic difference between electromagnetic waves and sound waves?
31airIn which medium does light travel faster, air or glass?
32It’s what happens when light strikes metal. What is the photoelectric effect?
33Radio wavesWhich type of electromagnetic wave has the longest wavelength and lowest frequency?
34X-rays take pictures of bones; gamma rays takes pictures of the brain Both gamma rays and X-rays are used to see inside the body. Which one is used to make images of bones? How are the other rays used?
35what the object is made of and the color of light striking the object What two factors influence the color of an object?
36Cheap and efficientWhy do Schools and businesses uses flourescent light bulbs?
37Red, orange, yellow, green, blue, indigo, violet What are the colors of the rainbow in order from largest wavelength to smallest wavelength?
38The sunlight goes through the water droplets (prisms) and then is refracted into the different colors of visible light.How does a rainbow form in nature? What is the prism?
39Diffraction is when a wave passes through an opening Diffraction is when a wave passes through an opening. Example – when you make a tiny hole in the end of your fist and look through it.What is diffraction and give an example of diffraction?
40greenIf you shine all the visible light colors on an object and the object reflects green light, what color is the object?
41You see lightning first because light is faster than sound. Why do you see lightning before you hear thunder?