Discussion
Consider the following statements about white LED spectra.
1. A blue pump and a phosphor is the commonest arrangement.
2. A dip between the blue peak and the phosphor is characteristic.
3. White LEDs emit a smooth blackbody continuum.
Answer: B
The first two are correct and describe the technology. The third is quite wrong, since the spectrum is markedly structured rather than smooth. A blue peak and a broad phosphor band dominate. The spectrum is structured rather than smooth.
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