Used these for my daughters wedding. I really cant put into words how amazed I was at the strength and length of these little guys. I have told everyone I know about them and plan on using them again (Id love larger boxes/packages)

Dark fieldimage

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dark-field microscopy

The selection of the direct beam or diffracted beam is analogous to capturing the information concerning that particular feature the beam has interacted with. If certain crystals have diffracted the incident beam, the scattering will occur as per Bragg’s condition. But, the orientation of each feature in similar fashion will scatter it at same angle. Thus, imaging from one diffracted beam (keeping the aperture and allowing it to form an image) may show few features bright (and the field will be dark). Important point to note here is that if another diffracted beam is allowed to pass through, then some other features will appear bright (and the field will remain dark). In summary, each diffracted spot is appearing due to specific orientation of certain features, which will start to appear bright if that diffracted beam is allowed to form the image. And in bright field mode, those features may or may not appear bright.

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Bright field dark field

These lights are awesome. I used them in my center pieces at my wedding and they worked out great. The package says they last up to 6 hours and mine are still running after 9 DAYS! Great product for the price. You won't be disappointed!

Brighten up your table setting or party display with these Mini LED Lights. These small lights feature a clear, plastic body and can easily be turned on by twisting the bottom. Add these bright lights to vases, flowers, balloons, or string them onto a wire or cord, so you can wrap them around decor items. These versatile lights will help bring an enchanting look to any party!