Light and Color Test



Light and Color Review #3Name _____________________Show all work on a separate piece of paper. Round your answers to three significant figures. Check your answer for the proper units and box.How long will it take for a radio message from earth to reach the first astronauts on Saturn? Assume Saturn is 1.42 x 109 km from the earth. State your answer in minutes.Determine the color each pigment would appear under the following lights:Blue LightCyan LightMagenta LightRed PigmentYellow PigmentCyan PigmentDetermine the color the light would appear when viewed through the specific filter:Green FilterYellow FilterMagenta FilterGreen LightCyan LightYellow LightYou find yourself on an alien planet and you want to find out the strength of gravity on the planet. Fashioning a pendulum 95.0 cm in length, you find that 85 swings takes 165 seconds. On earth you weigh 622 N. What do you weigh on this planet?You wish to print a color picture of the Union Jack (the British Flag) using your color printer. State the colors of ink used to form the red, white, and blue colors of the flag.Red: _______________________________________________White: ____________________________________________Blue: _______________________________________________TKTE broadcasts at 101.5 FM. What is the wavelength, in meters, of the radio waves from the new station?A tuning fork produces a sound with a frequency of 345 Hz and a wavelength of 1.20 m in air. What value does this give for the speed of sound in air?Hydrogen has a unique bright line spectrum. One of the waves that it emits when excited has a wavelength of 140.0 nm. What is the frequency of this light?A cat can hear sound frequencies up to 68,000 Hz. What is the wavelength of this sound wave if the speed of sound is 335 m/s?Fiber optic cables transmit television signals. For this to be done, the television signal may be used to control the brightness of a laser light, which can then be sent through a fiber of optical quality glass. Laser light has a wavelength of 680 nm. The speed of light in the optical fiber is 2.10 x 108 m/s.What is the frequency of the laser light in the fiber optic cable?What is the period of this laser light?Calculate the number of light waves delivered by the laser during the transmission of one television wave? One period of a television signal is about 5.00 x 10-6 s. ................
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