1.properties of light and it's interaction with matter
- 2. Light is a form of energy that travels as waves. Their wavelength determines many of the light's properties. For instance, wavelength accounts for light's color and how it will interact with matter. The range of wavelengths, from super short to very long, is known as the light spectrum.
- 4. Reflection Refraction Scattering Dispersion Interference Diffraction Total internal reflection Polarization
- 5. ● Reflection: The bouncing back of a light ray after hitting any surface is called reflection.
- 6. ● Refraction: The bending of a light wave when it enters in a medium where it has different speed is called refraction.
- 7. ● Scattering: The phenomenon by which a beam of light is redirected in many different directions when it strikes on a particle of matter, is called scattering.
- 8. ● Dispersion: The process of splitting white light into seven colors, is called dispersion.
- 9. ● Interference: The phenomenon in which the two waves super pose to form a resultant wave of greater, lower or same amplitude, is called interference.
- 10. ● Diffraction: The process of spreading of a light beam by passing through a narrow aperture or across an edge, is called diffraction.
- 11. ● Total internal reflection: Complete reflection of a light ray within a medium (such as water or glass) by striking the surrounding surfaces back to the medium, is called total internal reflection.
- 12. ● Polarization: The process of transforming unpolarized light into polarized light, is known as Polarization.
- 14. Matter is the stuff that makes up the universe — everything that has mass and occupies space is matter. For instance, a car would be said to be made of matter, as it has mass and volume (occupies space). There are three types of materials: Transparent materials Translucent materials Opaque materials
- 15. ● Transparent materials: The materials that allow complete light to pass from them, e. g., glass, water, air. ● Translucent materials: The materials that allow some light to pass from them, e. g., frosted glass, wax paper. ● Opaque materials: The materials that allow no light to pass from them, e. g., wood, plastic, stone.
- 16. Matter interacts with light in 3 ways: Refraction Happens in Transparent & Transluent materials. Reflection Happens in Opaque materials. Absorption Happens in Opaque materials.
- 17. Matter that transmits light is transparent. Matter that transmits light but scatters it in all directions is translucent.
- 18. Matter can reflect light. Reflection is the bouncing of light off a surface. When light strikes a smooth surface, the light bounces off at an angle equal to the angle at which it hits the surface, producing a clear image.
- 19. ● Absorption is the transfer of light energy to matter. ● Opaque materials do not let any light pass through them because they reflect light, absorb light, or both. e. g., vantablack (the darkest material).
- 20. When white light strikes an object, the color of the object depends on whether the object transmits, reflects, or absorbs the light. An object that reflects a certain color of light appears to be that color. ● For instance, a frog appears green because its skin absorbs all colors but green.
- 21. ● An object that reflects every color appears white. ● An object that absorbs every color appears black. ● Sometimes the color of an object depends on what light shines on it. • If a red filter is placed between a green frog and white light, the filter will absorb all colors of light except red, orange, and yellow. • The frog reflects no light, and you perceive the frog’s color as gray or black.
- 22. https://www.google.com/search?q=what+is+light&oq=what+is+l ig&aqs=chrome.1.69i57j35i39j0i273j0i20i263j0.5837j0j7&client =ms-android-huawei-rev1&sourceid=chrome-mobile&ie=UTF-8 https://www.tulane.edu/~sanelson/eens211/proplight.htm#:~:t ext=Light%20is%20electromagnetic%20radiation%20that,380%20n m%20and%20730%20nm https://www.khanacademy.org/science/ap-biology/chemistry- of-life/elements-of-life/a/matter-elements-atoms- article#:~:text=The%20term%20matter%20refers%20to,substance s%20through%20ordinary%20chemical%20reactions
- 23. :)