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The Physics of Light by Mr. Schneider, Rm 24 Hey kids, do you see the light Why How

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The Physics of Light by Mr. Schneider, Rm 24 Hey kids, do you see the light Why How

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    1. The Physics of Light by Mr. Schneider, Rm 24 Hey kids, do you see the light? Why? How?

    2. What Is Light? In this Powerpoint presentation: Properties of light Colors Reflection - Mirrors Refraction - Lenses

    3. Properties of Light Light travels in straight lines:

    4. Light travels much faster than sound. For example:

    5. Light travels VERY FAST – about 300,000 kilometers per second or 186,000 miles per second.

    6. Light can create shadows

    7. Light travels in waves A wave is a disturbance that transfers energy from place to place.

    8. What characteristics do light waves have? Light waves are like other kinds of waves. They have crests, troughs, wavelength, frequency and speed. However, light waves are electromagnetic! Light waves have a component that is electric and magnetic!!

    9. We see things because they reflect light into our eyes! This is literally the only way we get to see things! ALL objects we see either create light or reflect light!!

    10. Light is a form of energy called Electromagnetic Radiation - Electromagnetic Radiation comes from the sun and other sources

    11. Electromagnetic Radiation Travels at the speed of light Is mostly invisible Carries energy Is VERY important to society and is something YOU can’t be without for many reasons

    12. Types of electromagnetic radiation Radio and TV - Great for broadcasting Microwave-Super for cell phones, microwaves Infrared-Think HEAT Visible Light - Yep, it’s how we see Ultraviolet - Invisible, can cause cancer; kills germs Xray- images of bones and teeth; space exploration Gamma - treating cancer (radiation therapy)

    13. Properties of Light summary Light travels in straight lines and is a form of energy Light travels much faster (a million times faster!) than sound We see things because they reflect light into our eyes Shadows are formed when light is blocked by an object Visible light is only a small part of the electromagnetic spectrum; the other parts are invisible to the human eye but not necessarily the eyes of other animals.

    14. Part 2 - Reflection and Mirrors

    15. Regular vs. Diffuse Reflection Smooth, shiny surfaces have a regular reflection:

    16. Using mirrors Two examples:

    20. Review of Reflection

    21. Refraction

    26. Review of Refraction

    27. Color Part 3 - Color In this section of the Powerpoint you will learn about color and how we can mix colors to create other colors. We will also learn how light helps us to see various colors around us.

    28. Yes, we LOVE color!

    29. Color White light is not a single color; it is made up of a mixture of the seven colors of the rainbow.

    30. The colors of the rainbow: Red Orange Yellow Green Blue Indigo Violet

    31. Adding colors of light White light can be split up to make separate colors. These colors can be added together again. The primary colors of light are red, blue and green:

    32. Seeing color The color an object appears depends on the colors of light it reflects.

    33. In different colors of light this shirt would look different:

    35. Using filters Filters can be used to “block” out different colours of light:

    36. Some further examples:

    37. Investigating filters

    39. Part 2 - Reflection and Mirrors Reflection from a mirror:

    40. The Law of Reflection

    41. Brain Pop Movie on Color

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