2 1.In 1926, Michelson was able tomeasure the speed of light usingA lanterns B stars.C mirrors D sunlight.
3 2.To calculate the frequency ofan electromagnetic wave, youneed to know the speed of thewave and itsA wavelength. B intensity.C refraction D amplitude.
4 3. Because light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light isA radiation.B a stream of particles.C a wave.D heat.
5 4.Electromagnetic waves vary inA the speed they travel in avacuum.B wavelength and frequency.C the way they reflect.D their direction.
6 5.Light acts likeA a wave.B a particle.C both a wave and a particle.D neither a wave nor a particle.
7 6.Photons travel outward from alight source inA a single straight line.B increasing intensity.C a small, dense area.D all directions.
8 7.Infrared rays have a shorterwavelength thanA ultraviolet rays.B X-rays.C radar waves.D gamma rays.
9 A Far from the source, photons spread through a small area. 8. 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.
10 9. The waves with the longest wavelengths in the electromagnetic spectrum areA infrared rays.B radio waves.C gamma rays.D X-rays.
11 10.A translucent materialA scatters some light.B transmits all light.C absorbs all light.D reflects all light.
12 11.Cellular telephones utilizeA radar waves.B very high frequency waves.C very low frequency waves.D microwaves.
13 12. The visible light spectrum ranges between A radar waves and X-rays.B television waves and infrared rays.C infrared rays and ultraviolet rays.D ultraviolet rays and gamma rays.
14 13. Which of the following occurs as a light wave bends when itpasses from one medium intoanother?A constructive interferenceB refractionC destructive interferenceD reflection
15 14. A material that reflects or absorbs all of the light thatstrikes it isA translucentB opaqueC blackD white
16 15. In order of increasing frequency, the electromagnetic waves areradio waves, infrared waves,A microwaves, visible light, X-rays and gamma raysB visible light, UV rays, X-rays and gamma raysC gamma rays, X-rays, UV rays and visible lightD gamma rays, X-rays, visible light and UV rays
17 16.Objects appear fuzzy through amaterial that isA transparentB translucentC opaqueD polarized
18 17.Microwaves and radar areexamples ofA infrared wavesB radio wavesC X-raysD UV rays
19 Answer Key C 7. C 13. B A 8. D 14. B B 9. B 15. B B 10. A 16. B C 11. D 17. BD 12. C