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(b) Re-produce Figs. 2 and 3 and draw lines in the figures to indicate the ranges (in nm) of the spectral response of the RGB LED in the spectral graphs of the LDR and photodiode according to (a). Discuss the performance of the LDR and photodiode in light measurements in terms of the spectral response and sensitivity (using R, G and B as examples).

(b) Re-produce Figs. 2 and 3 and draw lines in the figures to indicate the ranges (in nm) of the spectral response of the RGB LED in the spectral graphs of the LDR and photodiode according to (a). Discuss the performance of the LDR and photodiode in light measurements in terms of the spectral response and sensitivity (using R, G and B as examples).

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Questions 1. The spectral characteristics of an RGB LED (which is basically three red, green and blue LEDs stuck into a single package, and can emit red, green or blue colour, or their combinations), LDR and photodiode are shown in Figs. 1-3, respectively. Relative spectral response (%) 100 90 80 70 60 50 40 30 20 10 Green HIWALN 550 100 50 400 Blue 450 500 Wavelength (nm) 0 400 460 500 540 580 620 660 700 740 780 820 870 Wavelength (nm) Relative spectral response (%) Fig. 1. Spectral characteristics of the RGB LED 100 90 80 70 60 50 40 30 20 10 600 0 Red 400 500 650 700 600 700 800 900 1000 1100 1200 Wavelength (nm) Fig. 2. Spectral characteristics of the LDR Fig. 3. Spectral characteristics of the Photodiode (a) Use Fig. 1, determine the peaks 5+5and wavelength ranges of the R(red), G(Green) and B(Blue) LED at the 50% of relative radiant intensity, respectively,
Transcribed Image Text:Questions 1. The spectral characteristics of an RGB LED (which is basically three red, green and blue LEDs stuck into a single package, and can emit red, green or blue colour, or their combinations), LDR and photodiode are shown in Figs. 1-3, respectively. Relative spectral response (%) 100 90 80 70 60 50 40 30 20 10 Green HIWALN 550 100 50 400 Blue 450 500 Wavelength (nm) 0 400 460 500 540 580 620 660 700 740 780 820 870 Wavelength (nm) Relative spectral response (%) Fig. 1. Spectral characteristics of the RGB LED 100 90 80 70 60 50 40 30 20 10 600 0 Red 400 500 650 700 600 700 800 900 1000 1100 1200 Wavelength (nm) Fig. 2. Spectral characteristics of the LDR Fig. 3. Spectral characteristics of the Photodiode (a) Use Fig. 1, determine the peaks 5+5and wavelength ranges of the R(red), G(Green) and B(Blue) LED at the 50% of relative radiant intensity, respectively,
(b) Re-produce Figs. 2 and 3 and draw lines in the figures to indicate the ranges (in nm) of the spectral response of the RGB LED in the spectral graphs of the LDR and photodiode according to (a). Discuss the performance of the LDR and photodiode in light measurements in terms of the spectral response and sensitivity (using R, G and B as examples).
Transcribed Image Text:(b) Re-produce Figs. 2 and 3 and draw lines in the figures to indicate the ranges (in nm) of the spectral response of the RGB LED in the spectral graphs of the LDR and photodiode according to (a). Discuss the performance of the LDR and photodiode in light measurements in terms of the spectral response and sensitivity (using R, G and B as examples).
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