Lighting

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/lighting

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the inventor of practical incandescent bulb system?Thomas Edison, patented in 1879
2. What is the primary energy conversion (incandescent)?Electrical energy to heat, then to light via black-body radiation
3. What is the difference between an incandescent bulb and a fluorescent lamp?Incandescent bulbs heat a filament to glow, while fluorescent lamps use gas that emits UV light which then turns into visible light on a phosphor coating.
4. How did Thomas Edison help make lights easier to use at home?Edison’s 1879 bulb used a durable filament, a vacuum seal, and a full electrical network, letting people light their homes and cities.

Black-Body Radiation: Electromagnetic radiation emitted by an opaque object due to its temperature.
Electroluminescence: The emission of light from a material when an electric current is passed through it.
Luminous Efficacy: A measure of how efficiently a light source produces visible light, expressed in lumens per watt.
Circadian Rhythm: The natural, internal process that regulates the sleep-wake cycle and other daily rhythms.