VISIBLE LIGHT.pptx

EM Waves
Visible Light

1. VISIBLE LIGHT

2. WHAT IS VISIBLE LIGHT ? The Visible Light Spectrum is a very small part of the Electromagnetic Spectrum that is visible to the human eye. The electromagnetic radiation in this wave is known as visible light or light

3. DISCOVERY OF VISIBLE LIGHT Spectrum was discovered by Isaac Newton in the 17th century ,. the truth behind white light using prisms – triangular bars of glass – to break the light into all of its different colors and then reassemble them again.

4. A lthough there is further knowledge that it had been discovered four centuries earlier in the 13th century by Roger Bacon.

5. USES OF VISIBLE LIGHTS Visible light is the range of electromagnetic waves that humans can see.  Anything that glows or gives off light makes waves of what we call visible light.  The sun, light bulbs, candles and fire are all things that people automatically think of when it comes to light, but visible light comes from many sources and in many colors.  Some other sources of visible light include: television and computer screens, glow sticks, and fireworks. 

6. Advantages of Visible Lights Visible light is extremely important to humans, we use it TO SEE ! Without light, our eyes would not be able to see images of anything.  We concentrate visible light to make lasers to use in everything from surgery, to CD players to laser pointers . Visible light waves also make our TV, computer and cell phone screens work .

7. Visible light is typically pretty harmless.  However , some light can be so intense that it can damage the receptor cells in your eye causing temporary or permanent blindness.  High powered lasers can also be damaging and will cause burns . Dis-Advantages of Visible Lights

8. MORE ABOUT VISIBLE LIGHTS

9. TRIVIA

10. A prism can break white light up into the visible light spectrum . You can also use your pen to break light spectrum. https://www.livescience.com/50678-visible-light.html

11. Visible light, which travels at a dizzying 186,282 miles per second through space, is just one part of light's broad spectrum, which encompasses all electromagnetic radiation. https://sciencing.com/visible-light-waves-8592114.html

12. The Light Spectrum White light and all the colors of the rainbow represent a small part of the electromagnetic spectrum, but they are the only forms of light we can see because of their wavelengths. Humans can only detect wavelengths between 380 and 700 nanometers. Violet has the shortest wavelength we can see, while red has the largest

13. Light Color and Energy Light color is usually determined by the energy being produced by the source that emits it. The hotter an object is, the more energy it radiates, resulting in light with shorter wavelengths. Cooler objects create light with longer wavelengths. For example, if you fire up a blowtorch, you will find its flame is red at first, but as you turn it up, the color becomes blue.

14. Colors of the star Similarly, stars emit different colors of light because of their temperatures. The surface of the sun has a temperature around 5,500 degrees Celsius, causing it to emit a yellowish light. A star with a cooler temperature of 3,000 C, like Betelgeuse, emits red light. Hotter stars like Rigel , with a surface temperature of 12,000 C, emit blue light.

15. Don’t judge people by its appearance