Photographic film

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/photographic-film

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 emulsion composition?Silver halide crystals (AgBr, AgCl, AgI) suspended in gelatin
2. What is the primary light-sensitive component?Silver halide crystals
3. What is photographic film and how does it capture pictures?Photographic film is a special paper with tiny silver crystals in a gelatin layer. When light hits the crystals, a hidden image forms that later becomes visible after developing.
4. Why did people use film instead of digital cameras in the past?Film was easier to carry and let people take many pictures on a roll. It also made it possible to show news and art to everyone.

Photochemistry: The study of chemical reactions that are initiated by light energy.
Latent Image: An invisible image formed on a light-sensitive material after exposure, made visible by development.
Silver Halides: Inorganic salts of silver and a halogen (bromine, chlorine, iodine) that are sensitive to light.
Emulsion: A mixture of fine particles (like silver halides) dispersed in a liquid or solid medium (like gelatin).