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Download State one piece of evidence supporting the wave model of light and
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1. State one piece of evidence supporting the wave model of light and one piece of evidence supporting the particle model of light. Ans: Wave—light diffracts, light interferes. Particle—light travels without a medium, the photoelectric effect. 2. Name the regions of the electromagnetic spectrum from shortest wavelength to longest. Ans: Cosmic rays, gamma rays, X-rays, ultraviolet, visible light (violet-red), infrared, microwaves, radio waves 3. Which photons have greater energy, those associated with microwaves or those associated with visible light? Ans: Visible light, because visible light has a higher frequency and frequency is proportional to energy. 4. Which band of the electromagnetic spectrum has the following? a. the lowest frequency Ans: radio waves b. the shortest wavelength Ans: cosmic rays (“gamma rays” is ok) c. the greatest energy Ans: cosmic rays ( “ “ ) d. the least energy Ans: radio waves 5. You and a friend are looking at the stars and you notice two stars close together, one is bright the other is fairly dim. Your friend comments that the bright star must emit much more ligh than the dimmer star. Is this necessarily right? Explain your answer. Ans: No, the star appears brighter because its light is more intense. This could be due to it producing more light than its neighbor or it might simply be closer than its neighbor allowing less time for the light to diffuse. A dim star 10 light-years away, might appear brighter than a bright star 10,000 light-years away.