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CoolStuff Demos with Violet Lasers

Posted on May1,2017 by Arbor Scientific, authored by Buzz Putnam There have been 0 comments

If you are talking about optics in the classroom and students are learning about how light waves behave, take a look at the blue-violet laser, which produces wavelengths at 405 nm.

“I definitely want one of those blue LASERS! Ahhhh... to write my name on a phosphorescent board the FIRST day of class in the dark from the back of the room. That WILL get their attention!”   -Buzz Putnam

 

Sure, it is a different color and that is always cool, but why use this over any other Laser?

  • Cover most of the visible spectrum – If you only have the red (650nm) and green (532nm) Lasers, you are still missing a large part of the visible spectrum. At 405nm, the blue-violet Laser provides a good representation of the shorter wavelengths present on the opposite end of the visible spectrum from red.
  • Diffraction grating differences - You can compare the red, green, and blue-violet Laser colors by pointing them through a diffraction grating to observe where the different wavelengths end up.
  • More Fluorescence - Unlike the green Laser, the blue-violet Laser can produce fluorescence on a wide variety of materials. In other words, the blue-violet wavelength of 405 nm excites the electrons of most materials to a higher energy level than the green Laser.
  • More phosphorescence - For your next trick, we recommend shining the Laser on something with “glow-in-the-dark” properties, such as a sheet of glow-in-the-dark paper. The effect, called phosphorescence, is due to the same characteristics of excited electrons that we saw in florescence. Only with phosphorescence, it takes longer for the material to transition back to its ground state, and therefore you see it longer with those types of materials. The green Laser does not produce these same effects. Show your students both situations and ask them why!

 

Why pay $79 for a violet LASER

Arbor Scientific has carefully screened all of our Lasers to make sure they offer a higher level of safety and peace of mind. There are low-cost versions available on the market today that could pose serious risk to your students due to a lack of infrared (IR) filters. Even pointers that use IR filtering could still be harmful, due to shoddy manufacturing that provides poor conversion efficiency (when converting from infra red to visible light). While all Lasers should be handled carefully to prevent users from harm and should never be pointed at unprotected eyeballs, these lower cost Lasers are particularly problematic in the academic atmosphere where there are many people in close proximity. For the safety of your students, please always make sure you have taken all the proper precautions possible, including the use of effective IR filtering.

Check Out These Cool Tools!

Violet Laser Pointer

With an output less than 5mW the Violet Laser Pointer has the power to WOW and its blue-violet glow is the newest color on the block.

Violet Laser Pointer

Violet Laser Pointer

Product # P2-7678

$65.00

Phosphor Glow Paper

Specially coated paper absorbs light and emits it slowly. Use a camera flash to create lasting shadows and explore phosphurescence. Try different colors and intensities of light - even ultraviolet!

Phosphor Glow Paper 5/pk.

Phosphor Glow Paper 5/pk.

Product # P2-9423

$19.95

Deluxe Green Laser Pointer

With a range of 2 miles the Deluxe Green Laser Pointer has the highest output power allowed by the FDA! 532 nm green laser pointer includes two AAA batteries.

Deluxe Green Laser Pointer

Deluxe Green Laser Pointer

Product # P2-7675

$75.00

Standard Red Laser Pointer

The powerful laser emits a beam at a frequency of 650nM that can focus upon a board or diagram -- anywhere you want your audience's attention -- up to 500 yds away.

Standard Red Laser Pointer

Standard Red Laser Pointer

Product # P2-7500

$28.00

Laser Tripod

Clip-on stand makes hands-free laser use a snap! The tripod comes with a mount that will hold down the 'on' button of our laser pointers. The angle is fully adjustable. Use the Velcro® strap to attach it to a ring stand or solid object.

Laser Tripod

Laser Tripod

Product # P2-7670

$16.00

Holographic Diffraction Grating

The most efficient grating ever offered. Achieves transmission capabilities exceeding 99.9%! See dim spectral lines. Produce bright rainbows from a single flashlight. 1000 lines/mm. 35mm glass slide mounts. Includes activities and tips.

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Solar Spectrum Chart

This handsome wall chart, covering the visible portion of the solar spectrum, makes an excellent teaching aid for any science classroom.

Solar Spectrum Chart

Solar Spectrum Chart

Product # P2-7066

$24.00

 

This post was posted in CoolStuff Newsletters, Lasers, Optics, Sound & Waves, Teacher Tools, Light & Color, The Teacher's Blog and was tagged with laser, Optics, violet laser, phosphoresence, fluorescence, laser demo


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