God's Outrageous Universe
Faith and Science
Genesis 1:3 And God said, “Let there be light,” and there was light.
John 1:1-5 In the beginning was the word and the word was with God and the Word was God. He was with God in the beginning. Through him all things were made, without him nothing that was made that was made. In him was life, and that life was the light of men. The light shines in the darkness, but the darkness has not understood it.
Psalm 33:6 By the word of the Lord all the heavens were made, their starry host by the breath of his mouth.
2 Corinthians 4:6 For God who said “let light shine out of darkness,” made his light shine in our hearts to give us the light of the knowledge of the glory of God in the face of Christ.
Psalm 119:105 Your word is a lamp for my feet and a light for my path.
Visible light is a small part of the electromagnetic spectrum. Watch this youtube lesson on the electromagnetic spectrum produced by NASA.
Light travels in a straight line – an essential property for seeing.
Light is the greatest mystery of science. We can only describe it properties and wonder about its fundamental nature.
Einstein postulated that light speed is the same for all observers independent of their relative velocities. The consequence of this postulate is that space and time are not constants. At velocities close to the speed of light space contracts and time slows.
A photon of light knows no time and needs no medium to carry its waves.
Light travels as a wave and at the same time is a particle called a photon carrying a package of energy that can be imparted to electrons or other forms of matter with electrical charge.
One cannot use a microscope to see things smaller than the wave length of the light that illuminates it. The wave length of visible light is 400 to 700 nanometer or .4 to .7 micrometers about the size of a large cell and about 1 to 10 thousand time larger than an atom.
Light is transmitted, refracted and reflected by a drop water. Refraction depends on color (wavelength) that is how we see a rainbow.
White light is really a mixture of light of many colors. Our brains interpret this mixture to be white. So white light is an illusion. Our TV's and computer monitors trick us to see white with just red, green and blue light pixels.
Photons of light carry the electric and magnetic forces. Like chages repel and opposites charges attract.
There are three other forces: Weak and Strong Nuclear Force and Gravity.