- 1990 - LIGHT - uses half your brain? Light up your brain with new knowledge. Here are interesting facts about the light of day. Just seeing it uses half your brain. Light started 13.8 billion years ago. Today it is microwave energy filling the Universe. Visible light occupies only one ten billionth of the total light spectrum.
-
-
----------------- 1990 - LIGHT - uses half your brain?
-
- Light did not start to shine until 340,000 years after the Big Bang. Before then the charged particles were so dense the photons just bounced around between them. Space had to expand enough for the photons to be free to expand along with space.
-
- This first light can still be seen today as Cosmic Microwave Background radiation. The light that started out as short wavelength Gamma Ray radiation has stretched to wider wavelengths as it traveled through expanding space. The light radiation left at 3,000 degrees Kelvin and today it has cooled to just 2.75 degrees Kelvin.
-
- Light travels at 186,282.4 miles per second. That is in a vacuum. In other medium it appears to travel slower but actually it is still traveling the same speed but moving through a crystal like diamond it is bouncing, absorption, re-emission, all averages out to a traverse speed of 77,500 miles per second. However, it is all that bouncing around that gives the diamond that dazzling sparkle.
-
- Eyeglasses correct vision because light slows down in glass or plastic in the same way and its path is bent at the transition surface from air to glass and back to air again.
-
- People glow in light, but, it is mostly infrared light. The glow is caused by the body’s free radical chemical reactions.
-
- Much greater bioluminescence is common in creatures living in the ocean. Apollo astronaut Jim Lovell used this phenomenon to locate his darkened aircraft carrier that stirred up the luminescence of this biology in its wake. (1954)
-
- Incandescent bulbs are very inefficient. They only convert 10% of the energy to light. Most of the rest is converted into heat. A 100 watt bulb in a confined space can cook at 325F. When I was living in Indiana my 55 Ford had to be outside. I put a light bulb on top of the engine and it started right up every morning at below zero temperatures. I was never tardy to 8:00 classes with a 20 mile commute in 3 years of college. Thanks to this technique.
-
- Light has no mass so it must always travel at the same , light speed. Anything with no mass travels at this speed, like muons. However, light does have momentum and therefore has energy. The energy of a photon is:
-
---------------------------- E = h*f
-
------------------------- Energy = 6.625 * 10^-34 kg*m^2/sec * frequency
-
- Apollo astronauts left a mirror on the Moon. Laser beam measurements have determined that the Moon’s orbit is moving outward from Earth at 1.5 inches per year.
-
- Our eyes see visible light. Fish can see infrared light. Bees, birds, lizards can see ultraviolet light.
-
- Photography got its name from “photo” - light , “graphy” meaning writing. Writing with light.
-
- The Auroras light up the night sky because ionized particles from the Sun crash into atmospheric molecules as the charged particles enter the north tic pole. Oxygen shines green, nitrogen shines blue and red.
-
--------------------- Other reviews available upon request.
-
- #1389 - The sunlight hitting you is 45,000 times more powerful than the radiation hitting you from the TV tower.
-
- #1386 - If you were on the Moon you could see a lightning strike in 1.3 seconds after it happened. If the sound, thunder, could travel through space you would not hear the thunder for 13 days. ( sound traveling at 750 miles per hour.)
-
- # 1288 - We take light for granted. Radio and TV and microwave ovens, and cell phones all depend on the same electromagnetic radiation. The wavelengths of radio extend to miles. FM radio wavelengths are at 9 to 11 feet. Microwaves at 12 centimeters (4.7 inches)
-
---------------------- red light -------------0.7 * 10^-6 meters
--------------------- blue light ------------0.4 * 10^-6 meters
-
- Visible light occupies only 1 ten-billionth of the electromagnetic spectrum, 400 nanometers to 700 nanometers
-
- The photons that carry this wave energy in their momentum are traveling at 670,633,500 miles per hour.
-
- Stand in front of a 60 watt light bulb. This is how fast the photons are hitting you. That is not the worst part. There are 1,800,000,000,000,000,000,000 photons hitting your body every second. (1.8*10^20)
-
- #1286 - When you look at the stars some of those photons hitting your eye took millions of years to get to you Some left the star before dinosaurs roamed the Earth.
-
- #1043 - Light travels one foot in a nanosecond ( 10^-9 seconds) Your girl friend standing 20 feet away is 20 billionths of a second older than the image you see of her.
-
- #940 - The Sun is radiating 65,000,000 watts per square meter per second.
-
- #934 - Each photon is an energy bundle. The higher the frequency the higher the energy
------------------ E = h*f ----------- Energy = a constant “h” times frequency.
-
- #726 - The force of an electric charge is 10^39 times greater than the force of gravity.
-
- #648 - Light is a physical symmetry for the entire Universe.
-
- #550 - Light does not know time. Time stops at the speed it is moving. Light is the conversion factor between energy and mass.
-
- #36 - What is the oldest thing you have ever seen? No it is not the pyramids. Not even the dirt at your feet that can not be older than 4,500,000,000 years. You need a telescope and your eyes can see photons that are 12,000,000,000 years old. What you see is a young star but today it is 12 billion years older than that.
-
- Hope that you will see the light. It is interesting.
-
- November 1, 2019
- --------------------------------------------------------------------------------------
---- Comments appreciated and Pass it on to whomever is interested. ----
--- Some reviews are at: -------------- http://jdetrick.blogspot.com -----
-- email feedback, corrections, request for copies or Index of all reviews
- to: ------- jamesdetrick@comcast.net ------ “Jim Detrick” -----------
- https://plus.google.com/u/0/ -- www.facebook.com -- www.twitter.com
---------------- Friday, November 1, 2019 ------------------------------------
------------------------------------------------------------------------------------------
No comments:
Post a Comment