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Effect of gold wire bonding process on angular correlated color temperature uniformity of white light-emitting diode

Bulong Wu1, Xiaobing Luo, Huai Zheng

  • 1Division of MoEMS, Wuhan National Laboratory for Optoelectronics, Wuhan, 430074, China.

Optics Express
|November 24, 2011
PubMed

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San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55 °C.