Diffraction Grating - Rainbow Peepholes™

$40.00
($ each)
Rated 5.0 out of 5
Based on 14 reviews

SKU #01601

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$40

Description

Fun with Diffraction Gratings!! Preprinted Rainbow Peepholes™. Always in stock and ready to ship. The ideal teacher incentive. Great in the classroom when a quality diffraction grating is needed for the study of Light and Color. Just look through your Rainbow Peephole at any light source...the rainbow starbursts will amaze you! RAINBOW PEEPHOLES: 13,500 Line/Inch Diffraction Grating - 1 11/16" Diameter, 1/2" Window - Heavy Carboard.

IMPORTANT: Minimum order for this item is 100 pieces at .40 each. To receive the quantity discounts advertised, you must add the quantity you're ordering to the quantity box on the order page.

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average rating 5.0 out of 5
Based on 14 reviews
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14 Reviews
Reviewed by Wesley H.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

love rainbow peepholes

They are wonderful. I have been using them for decades, usually buying around 500 or so per year. I give them to kids, people who have helped me, as part of tips at restaurants and stores, to school kids who visited our science department at the university where I used to teach (before retirement), as part of children's messages at my church, and as Christmas gifts to kids, especially relatives. I almost always have some with me wherever I go. The vast majority of people to whom I give them seem to really like them.

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Reviewed by John Q.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Perfect for Demonstrations

I'm getting ready for an "open house" where we are talking about x-ray diffraction from a synchrotron source. These peepholes make the perfect analog for a "sample" when paired with an inexpensive puck LED light where I can easily change the color via a remote. I masked out a single LED with a piece of cardboard to simulate the source. Looking through the peephole and changing the color demonstrates some key features such as the shrinking of the square pattern as color goes from red to blue (although green is best given the spectral purity of the lights I have). The 4 fold symmetry of the peephole is an analog to crystal symmetry and tilting the peephole to 45 degrees or so away from the face shows the reciprocal relationship between spacing and spacing in the diffraction pattern since our eye is seeing an angular projection of the diffraction grating in one dimension. The single LED is the "x-ray source," the peephole is "the sample", and the eye is "the detector". An excellent teaching demo. In the pictures, I just put peephole in front of my cell phone camera and its very easy to capture the effect. The pictures show the bare LED puck and then the red and green colors.

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Reviewed by Hannah L.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Great little giveaway

We are a science communication company and this was a perfect little giveaway at a recent conference.

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Reviewed by Patricia B.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Love these little diffraction lenses...only $.30 ea.

Our student go nuts over the light experiments with spectra.

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Reviewed by Tina H.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Fun!

I have used these for years to teach the wave nature of light and sometimes with additional equipment to help students understand spectra and how we use them in different science fields. And they are just Fun!

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