- Diffraction Grating Slides, Linear, 1000 Line/Millimeters, Made in USA, Package of 100

These diffraction gratings are amazing little things. There are 1000 lines per millimeter, causing light to be separated into the various components, like a prism would do. They're great gifts for curious minds. I give them out to people at the checkstand often, just because. The irony is that if you buy a pack of 20, it only costs around ten bucks, where if you only buy a pack of ten, it costs 12 bucks. Very strange indeed.

Work perfectly. Film secure in the slide frame.

I used these with my chemistry students to create their own spectrometers when reviewing the electromagnetic spectrum. They worked well for differentiating between continuous and discreet light spectrums. They’re nothing fancy and you can’t get too specific of a read on them, but they work well for a basic lesson.

Very nice. Great for educational projects. Bright diffraction patterns.

These items are really neat but unfortunately it’s kind of pricy for what you get. Plus you never need a bulk pack or will ever use all the quantities that come with this package.

These are great for understanding how lighting works. If you look at an incandescent light bulb through the slide and a little askance, you see a stretched out version of the light that looks like a rainbow. But if you look at a fluorescent source, you instead see multiple copies of the fixture in discrete colors (shades of red, green and blue) that reveal that the light comes from phosphors that emit these colors. Even if these lights claim to be "full spectrum", the actual spectrum is a discrete sampling of frequencies which together let us see as if the full spectrum were present. Various industrial lights, such as metal halide parking lot lights, have unique and identifiable spectrums. If you want to tell one type of light from another, these slide are infinitely more portable and cheaper than $5000 electronic meters! That said, people don't immediately get the knack of looking askance at a light through a slide. A fancy meter will work better for customer presentations.

Worked exactly like I needed it to. If this is a need you have, it will absolutely do the job.

These pre-mounted diffraction gratings are what you need if you want to make a good quality home made spectrometer. Sources for getting these gratings have dried up and this vendor is one of the few that still supplies them. The make a great STEM project for beginning science students. Another use for these gratings is to measure the optical frequencys of inexpensive lasers for Bath interferrometers

Product came as advertised

Excelente producto es lo que ofrecen

Used to use these in physics class when learning about light. I have no idea where these are produced but it's the exact same look with the odd rainbow colored cardboard holder. Regardless of how they look they work perfectly fine for demonstration purposes, the grating line-count is accurate. It handles low power lasers perfectly fine, it might not handle high powered lasers seeing as it's only plastic, but for this price I wouldn't expect it to, so I haven't bothered to try it.

Le produit est parfait mais attention une taxe de 9euros s'applique pour un produit qui coutait autant...merci le fisc!

ok