We have experienced a broadcast interruption at our transmitter site that services a large part of Central Southern Colorado. This includes the Salida region as well as the entire San Luis Valley—including Lake George, Coaldale, Del Norte and San Luis. We are actively working to assess the point of failure. Thank you for your understanding and support! Our live stream is also available online and on the RMPBS+ app.

Stream live and on-demand content now on our new app:
RMPBS+

Help tell more stories in 2026 - make a year-end gift!

Give Now
Crash Course Physics show's poster

Light Is Waves: Crash Course Physics #39

Explore the world of physics, motion, and energy with Dr. Shini Somara.

Light Is Waves: Crash Course Physics #39

Season 1 Episode 39 | 9m 41s | CC

The way light behaves can seem very counterintuitive, and many physicists would agree with that, but once you figure out light waves it all starts to make more sense! In this episode of Crash Course Physics, Shini shows us how we know that light exists as a wave and why that's really cool!

Related stories

Rocky Mountain PBS
Our cameras went to a lot of places this year. Here are our favorite shots from 2025
Rocky Mountain PBS staff share their favorite shots of the year
 | Carly Rose
Business & Economy
Tamale restaurants ready for Christmas rush
Tamales are a Christmas staple in households across North America. Here’s how Colorado restaurants get ready.
 | Cormac McCrimmon
Rocky Mountain PBS
Our favorite stories from 2025
RMPBS journalists shared the favorite stories they reported this year
 | Carly Rose

Crash Course Physics

Watch more episodes

See more
See more