캐스전화영어/화상영어 미국전화영어 북미전화영어

Reading

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Blue light is a type of light that exists at wavelengths between 380 and 500 nanometers(nm) and is often emitted from smart devices such as TVs, computers, and cell phones.
This light has a strong energy, so it is also used for acne treatment in the hospital. There are many controversies because of the harmfulness of blue light. Experts say exposure to blue light for a long time can cause eye fatigue as well as dry eye syndrome. In severe cases, blue light can damage the lens in the eye. In addition, if you watch a smart phone, PC, or TV late at night for a long time, blue light can interfere with sleep. We should use smart phones and TV wisely!

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Vocabulary

Emit

내뿜다

Uranium emits dangerous amounts of radiation.

Display

전시하다, 전시

Stores often display candy bars and gum near the checkouts.

Treatment

치료

He was able to walk again after he received treatment.

Exposure

노출, 폭로

Too much exposure to sunlight can cause sunburns.

Fatigue

피로

I felt so fatigued that I instantly fell asleep.

Comprehension Questions

1. What kind of harm can blue light cause?

블루라이트는 어떤 해를 끼칠 수 있나요?

2. What kind of devices emit blue light?

어떤 종류의 디바이스가 청색광을 방출하나요?

3. What happens when we use a smart phone for a long time?

스마트폰을 장시간 사용하면 어떻게 되나요?

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Discussion Questions

1. How many hours do you use your phone or watch YouTube?

휴대폰을 사용하거나 유튜브를 시청하는 시간은 얼마나 되나요?

2. Have you felt your eyes getting tired after using your phone for a long time?

휴대폰을 장시간 사용하다 보면 눈이 피로해지는 것을 느끼셨나요?

3. How can you control how much time you spend on your phone?

휴대폰 사용 시간을 어떻게 관리할 수 있나요?

Quizzes

- Which one is correct?

(A) Blue light can cause eye fatigue and dry eye syndrome.

(B) Blue light can help to moisten our eyes.

- Which one is correct?

(A) Blue light can help us sleep soundly.

(B) Blue light can interfere with sleep.