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1.7: Thinking about the Material
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Reflect and research
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What particle helps to give mass to all of the massive elementary particles?
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Name that physicist! Who was the first to propose that the universe is expanding?
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Before discovering the CMBR (Cosmic Microwave Background Radiation), scientists Arno Penzias and Robert Wilson were trying to detect radio waves with very sensitive antennae. The very first time they heard a consistent, low noise on their detectors they discovered that it was (mostly) not the CMBR. What was causing most of this noise?
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Physicist Lene Hau first slowed a beam of light to
\(17\:\text{m/s}\)
using a very cold, dilute gas of bosons. In 2001, how fast was she able to slow down the beam of light?
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Think of two theories that you use in your every day life. (For example, when we wash our hands, we do so because of the germ theory of disease!)