CHALSENGLISH CHALSENGLISH

► Exercise 07 | page 24 ❶ The laser is an example of the 4 underratingof the practical implications of a scientific discovery. ❷ When Arthur Schawlow and Charles Townes published their seminal paper describing the principle of the laser in Physical Review in 1958, it produced considerable excitement in the scientific community and eventually won them Nobel Prizes. ❸ However, neither these author..

► Exercise 01 | page 12 ❶ The 1 purity of recycled products plays a key role in explaining the strength of demand for them. ❷ One of the reasons for the high rate of aluminum recycling and the much lower rate of plastics recycling is the differential difficulty with which a high-quality product can be produced from discarded materials. ❸ Whereas bundles of aluminum cans have a relatively uniform..