The word “LASER” stands for Light Amplification by Stimulated Emission of Radiation. A laser is an optical light source that emits a concentrated beam of photons. Lasers are usually monochromatic – the light that shoots out is usually one wavelength and color, and is in a narrow beam. By contrast, light from a regular incandescent light bulb covers the entire spectrum as well as scatters all over the room. (Which is good, because could you light up a room with a narrow beam of light?).


Soon you’ll be building shattering light rays, firing music on a laser beam, and building your own laser light show from tupperware. Let’s get started by learning about lasers with this video:


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5 Responses to “Unit 9: Lasers Video”

  1. Thanks for the tip – we just tranferred a bunch of files and some might have not made it correctly. My team will fix this asap!

  2. Monika Van Kirk says:

    Hi,

    The video is not working… I also noticed that some of the other videos in the light lesson 1 section weren’t working either. Thanks!

  3. Cynthia Shaver says:

    A link would be great!!!!!!

    Or, if not a link just text that tells you the next lesson or unit that explains more on that topic. I know we’ re picky but we find that it’s easier to learn the whole subject at once, then move on and learn different things and then more on that subject.

    Cindy

  4. Yes, there is more content in the 9-12 level you can certainly try out, as it includes text downloads in addition to the advanced projects. Whenever when I state that we’ll touch more on that later, usually it’s in another unit. Maybe I should have a link under the video to the place where I do go into more detail?

    For example, in Unit 3, there’s more I go into about the atomic nucleus but that’s not until Unit 7, Lesson 1 (particle physics). Many of the units build on each other, so you’ll be getting all of it when you cover all the units. If there’s a specific area you need more help with, please let me now so I can point you in the right direction.

  5. Cynthia Shaver says:

    My daughter has noticed that in most ( not this one,) lessons and videos you say, “We’ll touch more on that subject later,” but, I can’t find that you do. So, I was wondering when do we get this information, do you get deeper in the 9-12 grade?

    WE love your program very much, she just feels that shes not getting deep enough into each subject.

    Should we also subscribe for 9-12? She’s in 7th grade.

    Thanks a bunch,

    Cindy