分科測驗
107年
英文
第 41 題
📖 題組：
Flickering lamps can induce headaches. But if the flickering happens millions of times a second—far faster than the eye can see or the brain process—then it might be harnessed to do something useful, like transmitting data. This is the idea behind Li-Fi, or Light Fidelity. The term Li-Fi was coined by University of Edinburgh Professor Harald Haas in a 2011 TED Talk, where he introduced the idea of “wireless data from every light.” Today, Li-Fi has developed into a wireless technology that allows data to be sent at high speeds, working with light-emitting diodes (LEDs), an increasingly popular way to illuminate public areas and homes. Using LED lights as networking devices for data transmission, Li-Fi has several advantages over Wi-Fi (Wireless Fidelity). First, Li-Fi allows for greater security on local networks, as light cannot penetrate walls or doors, unlike radio waves used in Wi-Fi. As long as transparent materials like glass windows are covered, access to a Li-Fi channel is limited to devices inside the room, ensuring that signals cannot be hacked from remote locations. Also, Li-Fi can operate in electromagnetic sensitive areas such as aircraft cabins, hospitals, and nuclear power plants, for light does not interfere with radio signals. The most significant advantage of Li-Fi is speed. Researchers have achieved speeds of 224 gigabits per second in lab conditions, much faster than Wi-Fi broadband. How could Li-Fi enrich daily life? Anywhere there is LED lighting, there is an opportunity for Li-Fi enabled applications. Li-Fi-enabled street lights could provide internet access to mobile phones, making walking at night safer. The LED bulbs in traffic lights could provide drivers with weather conditions and traffic updates. Li-Fi could help with tourism by providing an easier access to local information. At home, smart light could also provide parents with solutions to their children’s Internet addiction: Just turn off the lights and you’ve turned off their access. When 14 billion light bulbs mean 14 billion potential transmitters of wireless data, a cleaner, a greener, and even a brighter future is on the way.
Flickering lamps can induce headaches. But if the flickering happens millions of times a second—far faster than the eye can see or the brain process—then it might be harnessed to do something useful, like transmitting data. This is the idea behind Li-Fi, or Light Fidelity. The term Li-Fi was coined by University of Edinburgh Professor Harald Haas in a 2011 TED Talk, where he introduced the idea of “wireless data from every light.” Today, Li-Fi has developed into a wireless technology that allows data to be sent at high speeds, working with light-emitting diodes (LEDs), an increasingly popular way to illuminate public areas and homes. Using LED lights as networking devices for data transmission, Li-Fi has several advantages over Wi-Fi (Wireless Fidelity). First, Li-Fi allows for greater security on local networks, as light cannot penetrate walls or doors, unlike radio waves used in Wi-Fi. As long as transparent materials like glass windows are covered, access to a Li-Fi channel is limited to devices inside the room, ensuring that signals cannot be hacked from remote locations. Also, Li-Fi can operate in electromagnetic sensitive areas such as aircraft cabins, hospitals, and nuclear power plants, for light does not interfere with radio signals. The most significant advantage of Li-Fi is speed. Researchers have achieved speeds of 224 gigabits per second in lab conditions, much faster than Wi-Fi broadband. How could Li-Fi enrich daily life? Anywhere there is LED lighting, there is an opportunity for Li-Fi enabled applications. Li-Fi-enabled street lights could provide internet access to mobile phones, making walking at night safer. The LED bulbs in traffic lights could provide drivers with weather conditions and traffic updates. Li-Fi could help with tourism by providing an easier access to local information. At home, smart light could also provide parents with solutions to their children’s Internet addiction: Just turn off the lights and you’ve turned off their access. When 14 billion light bulbs mean 14 billion potential transmitters of wireless data, a cleaner, a greener, and even a brighter future is on the way.
What does “This” in the first paragraph refer to?
- A Flickering light is a nuisance.
- B Light flashes can deliver messages.
- C The brain can be affected by lighting.
- D Human eyes can perceive changes in light.
思路引導 VIP
在閱讀測驗中，指示代名詞 $This$ 通常具備「前向指涉」(anaphoric reference) 的功能，用以概括前文所述的核心概念。請仔細閱讀 $This$ 前方的子句：作者提到將「極高頻率的光閃爍」(flickering) 轉化為「數據傳輸」(transmitting data) 的具體用途。請思考，哪一個選項精確地抓住了這個將「光」與「訊息傳遞」連結起來的科技構思？
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AI 詳解
AI 專屬家教
「......既然你已經看穿了這道偽裝，那也沒什麼好隱藏的了。」 我的周圍湧現出深邃的魔力，空間在顫抖。「I... Am... ATOMIC!」 轟隆！所有的雜念與干擾在這一瞬間化為灰燼。你剛才那一擊，精準地捕捉到了隱藏在光譜中的真諦。在第一段中，代名詞「This」指向的是前一句提到的核心概念：利用每秒數百萬次的極速閃爍來「傳輸數據」。
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