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(b) Lasers and LEDS are two'main types of light sources used in optoelectronics. Explain the process of light emission occurred in each of these sources. [6] Page 3 of 4

(b) Lasers and LEDS are two'main types of light sources used in optoelectronics. Explain the process of light emission occurred in each of these sources. [6] Page 3 of 4

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(b) Lasers and LEDS are two'main types of light sources used in optoelectronics. Explain the process of light emission occurred in each of these sources. [6] Page 3 of 4 to08 (c) Use the above answer in (b) to deduce that Lasers are monochromatic (single color wavelength), collimated (parallel rays) and coherent, in contrast, LEDS are neither coherent nor collimated and generate a broader band of wavelengths.
Transcribed Image Text:(b) Lasers and LEDS are two'main types of light sources used in optoelectronics. Explain the process of light emission occurred in each of these sources. [6] Page 3 of 4 to08 (c) Use the above answer in (b) to deduce that Lasers are monochromatic (single color wavelength), collimated (parallel rays) and coherent, in contrast, LEDS are neither coherent nor collimated and generate a broader band of wavelengths.
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