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Showing posts with label electromagnetic spectrum. Show all posts
Showing posts with label electromagnetic spectrum. Show all posts

Thursday, November 19, 2020

Let there be light! I'm thankful for the electromagnetic spectrum

Genesis 1:1 In the beginning, God created the heavens and the earth. 2 The earth was formless and empty. Darkness was on the surface of the deep and God’s Spirit was hovering over the surface of the waters. 3 God said, “Let there be light,” and there was light. 


There is controversy over whether Genesis 1 is to be taken as a sequential account of the creation, or should be interpreted in some other way, and over when and how long creation took place. Lets put those matters aside. They dont really matter for the topics of this post. The first reported created act (although the creation of the earth seems to have come first) is bringing light about. Thats important.

Light is important. The main source of usable energy on earth is light. Energy from light drives the water cycle. Light is absorbed by green plants, and almost all of the food we eat exists because of that. Light makes it possible for us to perceive where we are, where we are going, and who and what is around us. Light makes it possible for us to work, and to play. Without light, reading would be difficult or impossible. Except for those unfortunates of us who are blind, we live in a world perceived and navigated because light is present.

The Bible doesnt say let there be an electromagnetic spectrum. Such a term wouldnt have made sense to the ancient Israelis, and doesnt make sense to a lot of us today. See here for more about that spectrum. But I will say that visible light is a rather small part of a range of energy forms, ranging from gamma rays, X-rays and ultra-violet to infrared, microwaves and radio waves. The people living when Genesis was written, and when it became a part of their culture, had no way of detecting these other forms, or appreciating their importance. However, whenever and however light came to be, this whole family of energy must have accompanied it. I dont know about you, but I use WiFi every day. Im not sure whether my phone uses 5G or not, but, whether it does, or not, its using part of the electromagnetic spectrum to help me communicate.

I had a chest X-ray a few weeks ago. That part of the electromagnet spectrum allows us, as it were, to see parts of our bodies that we can't see with ordinary light.

We open our blinds frequently. This is partly so we can see our surroundings. It is also to help heat our home without adding to the utility bill. Light is reflected -- thats how we see, as light is reflected off of whatever we are looking at, and comes back, going through our pupils and striking our retinas. But it is also absorbed, for example by green plants that carry on photosynthesis. Some of the absorption is manifest in that light energy is converted to heat energy, which, when radiated, is another part of the electromagnetic spectrum. Without heat derived from the suns light, the earth would be uninhabitably cold.

Some other Biblical thoughts about the electromagnetic spectrum. Heres a quotation from 1 Timothy: “6:16 He alone has immortality, dwelling in unapproachable light, whom no man has seen, nor can see: to whom be honor and eternal power. Amen.” Unapproachable light? Yes, there is that, physically. We cant be exposed to parts of the electromagnetic spectrum, in any great amount, or for any great length of time, without suffering damage, or even death. Is the scripture talking about the electromagnetic spectrum, as physicists measure it, or is this symbolic of Gods great holiness and power? Or is it both? I dont know.

John 8:12 Again, therefore, Jesus spoke to them, saying, “I am the light of the world. [Perhaps referring to Isaiah 60:1] He who follows me will not walk in the darkness, but will have the light of life.” Christ, Himself, illuminates, warms, communicates. He is truly the light of the world. (See John 1:1-9.)

Finally, Revelation 22:4 They will see his face, and his name will be on their foreheads. 5 There will be no night, and they need no lamp light or sun light; for the Lord God will illuminate them. They will reign forever and ever. I don’t pretend to understand this, but its part of the Bible.

Thanks for reading. Image modified from Pixabay. Scripture in this color, from the World English Bible.

Friday, November 24, 2006

What the Bible says about light

I recently posted about my gratitude for the electromagnetic spectrum. "Light" is the most common word used for that type of energy. The electromagnetic spectrum includes other types, however, but I'm sticking with light in this post. Actually, maybe I'm not. It is possible that some of the occurrences of "light" in the Bible refer to the entire spectrum, or to energy in general. I don't know for sure.

What does the Bible say about light? Below, I have given some of what I believe to be the most important uses of this word in scripture.

The first specific creative act of God, in Genesis 1 (all scriptural links are to the ESV), is the creation of light. Since the exact interpretation of Genesis 1 is in some doubt, I cannot say that the first creative act was God's creation of light. That is, it is possible that Genesis 1:1-2 is a summary statement, with specifics given in what follows, and that, thus, God's first creative act was the creation of light. It is also possible that the earth was already present when God created light, because Genesis 1:1-2 describe the creation of the earth first. We don't know. In either case, the creation of light was very significant. No wonder that James 1:17 describes God as the "Father of lights."

After the flood, God promised never to destroy the earth again by a flood, and He chose a rainbow, a phenomenon caused by light passing through water, to signify this.

During the Exodus, God showed Himself to the Israelites (at night, at least) as a light-giving pillar of fire, light enough to travel by.

In Exodus 25, and elsewhere, the Israelites were commanded to prepare light in the Tabernacle, as part of their worship of God.

In 2 Samuel 22, David said: "For you are my lamp, O Lord,
and my God lightens my darkness." (verse 29) Perhaps this is the first time that God's presence and communication with humans is compared to light. In Psalm 27:1, first part, David wrote that
"The Lord is my light and my salvation;
whom shall I fear?"

Job refers to the day when he was born, and wishes that it had never happened (chapter 3) saying that he wishes it had been condemned to darkness. Darkness and evil, and light and good, are often linked, in the Bible.

Psalm 119:105 says "Your word is a lamp to my feet
and a light to my path," comparing God's word to light. 1 John 1 is one of the places in the New Testament where God's revelation to humans is compared to light.

In Isaiah 9, Isaiah, apparently speaking of the coming of the Messiah, compares this event to the appearance of a great light. (This passage is quoted in Matthew 4:12-16.)

Jesus, in Matthew 5:14-16, compares the God-honoring life of his followers to light.

In John 1:1-13, the revelation of God in Christ Jesus is compared to light. John 3:16-21 says that that revelation of light has brought judgment. In John 8:12, Jesus describes Himself as the light of the world.

1 Timothy 6:11-16 says that Jesus "dwells in unapproachable light. . ."

As the first chapter in the Bible refers to light, so does the last, Revelation 22:1-5, which says that the only light necessary in heaven is God, Himself.

I submit to you that God has been well aware of the importance of light, and has used it as a symbol of Himself, throughout the time of His interaction with humans.

Thanks for reading.

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February 6, 2009. A commenter kindly pointed out that I had mistakenly omitted "by a flood" from the fourth paragraph above, and I have fixed that.