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What Is Light? Lesson 109
Episode 1236th January 2026 • Nat Theo Nature Lessons Rooted in the Bible • Eryn Lynum
00:00:00 00:31:46

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We see and use light every day, but have you ever wondered what is light? Why can we see colors? And how did God use light at the very beginning?We’re exploring how light travels in waves and photons, why objects bounce colors into our eyes, and even how creatures glow using living light (bioluminescence) and reflective light (biofluorescence). We’ll hear how in Genesis 1:1-5 God said, “Let there be light,” and see how that shines into our lives today. Get ready to discover the amazing science of light — and the One who IS the Light!

Here’s our trail map:

  1. What Is Light?
  2. How Do Colors Work?
  3. Where Can We Find Light In Nature?
  4. How Is God Light?

Eryn's Books:

  1. The Nature of Rest: What the Bible and Creation Teach Us About Sabbath Living: https://www.amazon.com/Nature-Rest-Creation-Sabbath-Living/dp/0825448891
  2. Rooted in Wonder: Nurturing Your Family's Faith Through God's Creation: https://www.amazon.com/Rooted-Wonder-Nurturing-Familys-Creation/dp/0825447615
  3. 936 Pennies: Discovering the Joy of Intentional Parenting: https://www.amazon.com/936-Pennies-Discovering-Intentional-Parenting/dp/0764219782


Episode Links:

  1. Save 20% and get a FREE speaker using code Nat20 at https://www.sherwoodkids.com/nat20 (offer valid through March 31, 2026)
  2. Discover all of Apologia’s curriculum and courses from a Biblical worldview: https://www.apologia.com/
  3. Parents and caregivers: hear remarkable stories of God’s work in real people through the Compelled Podcast: https://compelledpodcast.com/
  4. Nat Theo Club Bonus Video: https://erynlynum.com/member
  5. Get full lesson guides in the Nat Theo Club: https://erynlynum.com/club
  6. Free God Made Light Coloring Sheet: https://erynlynum.com/how-do-colors-work/
  7. Ask your nature question: https://erynlynum.com/ask


Scriptures Referenced in This Episode:

“In the beginning God created the heavens and the earth. Now the earth was formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.

And God said, ‘Let there be light,’ and there was light. God saw that the light was good, and he separated the light from the darkness. God called the light ‘day,’ and the darkness he called ‘night.’ And there was evening, and there was morning—the first day.” Genesis 1:1-5 (NIV)

“Before the mountains were born

or you brought forth the whole world,

from everlasting to everlasting you are God.” Psalm 90:2 (NIV)

“...God is light, and in him there is no darkness at all.” 1 John 1:5b (NCV)

“In the beginning there was the Word (Jesus). The Word was with God, and the Word was God. He was with God in the beginning. All things were made by him, and nothing was made without him. In him there was life, and that life was the light of all people. The Light (Jesus) shines in the darkness, and the darkness has not overpowered it.” John 1:1-5 (NCV)

“But you are a chosen people, royal priests, a holy nation, a people for God’s own possession. You were chosen to tell about the wonderful acts of God, who called you out of darkness into his wonderful light.” 1 Peter 2:9 (NCV)


Terms Learned in This Episode:

  1. Light: Energy that helps us see things.
  2. Light Waves: Tiny waves of energy that travel through space (an area).
  3. Bioluminescence: “Living Light.” Light created by creatures through a chemical reaction in their bodies.
  4. Biofluorescence: When a creature absorbs light and re-emits it as a different color, causing the creature to glow when light is shined on them.


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