Sadaf+Qureshi

**__Miracles of Light __**



**Description: ** This picture here is reflecting a smiley face, which is inscribed on a light bulb and is reflecting on a notecard. The front surface of the image works as a convex refractor and the back surface of the image acts as a concave refractor.

** Light: ** Light is made up of photons and photons do not have mass and they travel at the speed of light. This image contains all the basics of light. Concave lenses causes the light rays to separate, thus making the object appear smaller than it actually is. For example the side mirrors of cars have this effect. Convex lenses on the other hand causes the light rays to come together, thus making the object appear bigger than it actually is. For example the inverted smiley face in this picture looks bigger than it actually is. Reflection is the process by which light passes from one substance into another substance. In the picture above the light passes from the projector to the notecard. Refraction occurs when light changes its direction so like it hits a substance and then bounces off it. The reflector works with convex mirrors and concave mirrors. For concave mirrors the light rays comes together and for convex mirrors the light rays separate. If you look closely the vertical or upright smiley face is refracted through the convex refractor and the inverted smiley face is reflected through the concave reflector.


 * Waves: ** Light bulbs are one of the sources of visible light waves. Light is an electromagnetic wave and it is a visible light. Light waves consist of wavelength, frequency and amplitude. Whenever light hits a substance it can perform three functions reflection, absorption and refraction. In the picture above the light is reflecting on the notecard thus the inscribed smiley face is visible on the notecard.


 * Energy: ** When Hydrogen atoms combine to form helium atoms light energy is produced. Sun is the natural source of light energy and lamps, light bulbs are artificial sources of light energy since they are man made. Light travels at a speed of 3x10^8 and one of the properties of light energy is diffraction which occurs when light energy waves bend and spread out. Light energy is a form of kinetic energy it takes the form of visible light waves like light from the light bulb in the picture above.

//__ References: __//

// "An Electrician's Guide to Choosing the Correct Light Bulb." Trim Electric. N.p., 31 Jan. 2013. Web. 18 Mar. 2013. . //

// "Get to the Root of It: Basic Science Concepts." Telescopes from the Ground up. N.p., n.d. Web. 11 Mar. 2013. . //

// "Halloween Clip Art of a Mysterious Light Bulb Mascot Cartoon Character Wearing a Red Mask over His Face." Halloweew Illustrations. N.p., 11 Sept. 2012. Web. 18 Mar. 2013. . //

// "Light and Optics." English-Online. N.p., n.d. Web. 12 Mar. 2013. . //

// "Light Energy." Light Energy. N.p., n.d. Web. 12 Mar. 2013. . // // "SmileyX4." Flickr. N.p., 3 June 2012. Web. 18 Mar. 2013. . //