Diffraction Grating Slides-Linear 1000 Line/mm

Very cheap price. Excellent results. I use this to check the pass frequencies of colored filters used for photography and my Telescope. I think the material is high quality, they may be selling this at a deep discount because of faint smudge or scratch that doesn't affect the results.

Dear Lady or Sir, I have received my order parcel on time, there is no any problem everything is ok. Thank you very much for everything. Best Regards Notice:Order parcel can be a problem that for were it is flexible.

Works great. Not perfectly smooth film or anything, but good enough for a toy spectroscope.

Works perfectly, too many lines to count under the microscope at 400X. Why not five stars? Mine had a very clear and dark finger print in the middle of the slide. Does it affect the performance, no. Does it look ugly, yes. I've not decided to try to clean it.

this company contacted me regarding a mediocre review that I submitted for this item - SEOH contacted me and asked why did I give this a 3 star rating - I replied that I only briefly looked at the grating to see if it was working , it was. Amazon then contacted me for a product review almost immediately - I had not had enough time to test it , so gave it an average rating. I have since tested it and it works just fine - creating a usable spectrum for an amateur spectroscope. Slow down , Amazon!

These work as expected for plastic diffraction gratings. They should have been packed a little better to avoid scratches but these are really meant for demonstration for education purposes not to build scientific instruments.

I had purchased the 500 L/mm version but wanted a little more resolution. This 1000 L/mm provides more detail in the spectrum and is made very nice. The slide is cardboard so it needs to be handles with care. You can use it without any other setup but to see a detailed spectrum you will need a way mount this in a spectroscope. Good spectroscopes are not cheap but this can replace the prism in older units to provide greater detail of the spectrum.

when I got these, I thought that I was going to be able to see the different wavelengths of light by holding it up to a light source like the sun or a ceiling light. but could not figure out how to get consistent results for the light sources in my normal environment. maybe its good for scientific research or something, and if it came with directions it might have been a lot more useful.

Simple but elegant. Ideal for benchtop diffraction demonstrations. Creates a clear spectrum for do-it-yourself elementary spectroscope. Good for quickly identifying significant spectral shifts in a lighting setup as well as crude identification of spectral lines from plasma light sources.

Quick delivery, intact, as expected

2\" X 2\" , I thought it meant 2 inches by 2 inches, in fact is very very tiny and can barely fit one eye in it :(