travels at different waves and spans in a very broad spectrum. This wide spectrum of wavelengths and photon energy is called the electromagnetic spectrum. There are 7 different types of waves in an electromagnetic spectrum; radio waves‚ microwaves‚ infrared waves‚ visible light‚ ultraviolet waves‚ x-rays and gamma rays. Each of these categories contains different type of waves‚ which varies in wavelength and photon energy‚ which is the units in which electromagnetic radiation come in. Figure 1. An
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region (375nm-780nm) is used as a medium for data transmission is more secure and achieves high data rates as compared to conventional wireless technologies like Wi-Fi‚ Bluetooth‚ Wimax etc.‚ which use radio waves for communication. Till late 1990s infrared spectrum is used for the communication. But in the early 2000s‚ researches started using visible light from LEDs as the medium for communication. Initially they were able to achieve network speed about 100Kbps. With continuous developments‚ VLC systems
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ground temperatures at a global average of about 60 degrees farenheit. Without them the average would be below the freezing point of water. The gases have this effect because as incoming solar radiation strikes the surface‚ the surface gives off infrared radiation. The effect is comparable to the way in which a greenhouse traps heat and that is how we got the name greenhouse
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------------------------------ = -------------- x 100 = 10.6% Amt. Cloves used 5 g In this experiment‚ it was shown that about 10.6% of an oil could be recovered from cloves by steam distillation. This oil was identified as eugenol by comparison of its infrared spectrum with an authentic sample. POST LAB 2.) The active component is Eugenol. It is a phenylpropene‚ an allyl chain-substituted guaiacol. Eugenol is a member of the phenylpropanoids class of chemical compounds. It is slightly soluble in water
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= 47R C1 = 100uF-16V C2 = 100nF-63V C3 = 470uF-16V D1 = 1N4007 D2 = Red LED D3 = Green LED Q1 = BC558 Q2 = BC548 IR = TSOP1738 IC1 = CD4017 RL1 = Relay 5V DC Circuit Operation: The 38kHz infrared rays generated by the remote control are received by IR receiver module TSOP1738 of the circuit. Pin 1 of TSOP1738 is connected to ground‚ pin 2 is connected to the power supply through R5 and the output is taken from pin 3. The output signal is
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GLOBAL WARMING AND GREEN HOUSE EFFECT – HOW CAN WE STOP THEM ? The greenhouse effect occurs when certain gases in the atmosphere trap infrared radiation whereas Global warming refers to an increase in the average temperature of the Earth as a result of the greenhouse effect. Burning fossil fuels raises the level of carbon dioxide in the atmosphere‚ and it is a major contributor to the greenhouse effect and global warming. We can help to reduce the demand for fossil fuels‚ which in turn reduces
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until the IR illumination conditions of that region nearly constant. For example‚ if the potentiometer is tuned inside room/building for maximum sensitivity and then taken out in open sunlight‚ it will require retuning‚ since sun’s rays also contain Infrared (IR) frequencies‚ thus acting as a IR source (transmitter). This will disturb the receiver’s sensing capacity. Hence it needs to be returned to work perfectly in the new
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2010) (2010‚ in press) 3 Signal Processing Perspective)‚ vol. 2009‚ Article ID 184617‚ p review. J. Comput. Vis. Image Understanding 97(1)‚ 103–135 (2005) sensing. 2004 IEEE Intelligent Vehicles Symposium‚ pp 8. Mudaly‚ S.S.: Novel computer-based infrared pedestrian data-acquisition system. Electron. Lett. 15(13)‚ 371–372 (1979) Veh. Symposium 1‚ 15–20 (2002) 242 Trans. Veh. Technol. 53(6)‚ 1666–1678 (2004) 11 Sci. 3546‚ 527–531 (2005) 12 IEEE Trans. Pattern Anal. Mach. Intell. 29(4)‚ 627–639 (2007)
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among other things. By looking at the shape of the spectrum of light emitted by a star‚ we can tell something about its average surface temperature. i) If we observe a star’s spectrum and find that the peak power occurs at the border between red and infrared light‚ what is the approximate surface temperature of the star? (in degrees C) 3767 C ii) If we observe a stars spectrum and find that the peak power occurs at the border between blue and ultraviolet light‚ what is the surface temperature of
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___________? a. Humble b. Arrogant c. Auspicious d. Joyful 8. What is the missing number? 1 4 9 ? 25 a. 15 b. 16 c. 18 d. None of these The rate of interest obtained is a. 12.5% b. 13.5% c. 15% d. 16 2/3% 10. The ozone layer restricts a. Visible light b. Infrared radiation c. X-rays and gamma rays d. Ultra violet radiation Ans: ( d ) Ans: ( c ) Ans: ( b ) 9. A man bought 20 shares of Rs 50 at 5 discount‚ the rate of dividend being 13 ½ . Ans: ( b ) Ans: ( b ) Part II: Descriptive type: Duration 45 Minutes
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