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It's Okay to Be Smart: How Well Do Masks Work? (Schlieren Imaging In Slow Motion!)

7 minutes 25 seconds

Now Playing As: Captioned (English) (change)

Wearing a mask is a cheap and easy way to help stop the spread of airborne infections like COVID-19. Here's some slow-motion Schlieren imaging experiments to demonstrate why masks work. Part of the "It's Okay to Be Smart" series. Please note this title contains mature themes and references.

Media Details

Runtime: 7 minutes 25 seconds

Topic: Health and Safety, Science
Subtopic: Diseases and Conditions, Science Experiments, Science Methods
Grade/Interest Level: 9 - 12
Standards:

Release Year: 2020
Producer/Distributor: PBS Digital Studios
Series: It's Okay to Be Smart
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Seven different butterflies, where four are placed at the corners facing the butterfly at the center and two at either side of the central butterfly.

Different math equations and graphs are drawn, with a butterfly as the backdrop.

An animal with the body of a lion, an extra goat head on its back, and a snake instead of a tail. Caption: Chimera.

A star filled night sky. Caption: P B S.

Sunlight is shining through in a forest with large number of trees.

Eggs of Screech owl, Turkey vulture, Audubon's Caracara, Kingfisher, Common Murree, Yellow Billed. Caption: Stoddard Et Al. Science 20 17.

A view of Moon in the dark sky. Caption: Maria, Latin for seas, and Sea of Tranquility, Mare Tranquillitatis.

Two different types of bacteria are seen all over a human outline. Caption: 37.2 trillion and 39 trillion.

Collage with black and white illustration of a twelfth century Chinese man holding out a scrap of paper. A red lantern on a pole overhead. Red prohibited symbol covers image of 2 gold bars.

The sample particles enter the mass spectrometer, which is accelerated, and then separated according to their individual mass of the particles by a magnet.

Viewer Comments

Lindsey S. (Bellevue, NE)

December 2nd, 2020 at 02:47 PM

Parts of this video are definitely geared towards older students, but I showed the beginning to a 4th grader and she was astounded by the Schlieren Imaging. It gave her a much better understanding of why masks are important (especially keeping it over your nose).
Carrie W. (Algonquin, IL)

October 7th, 2020 at 08:29 AM

Extremely informative. Wonderful visualization!