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Our greeting cards are 5" x 7" in size and are produced on digital offset printers using 100 lb. paper stock. Each card is coated with a UV protectant on the outside surface which produces a semi-gloss finish. The inside of each card has a matte white finish and can be customized with your own message up to 500 characters in length. Each card comes with a white envelope for mailing or gift giving.
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First evidence existence of positron single track antiparticle of electron from California Institute of Technology; Cloud Chamber; adduced by C.D.... more
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2 - 3 business days
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Average Rating (4.84 Stars):
Sandra Johnson
April 18th, 2024
I fell in love with this photo the day that Jan posted it. The cards are beautiful, frame able for a small space. I like that they have plenty of room for writing or doodling inside.
Cinder Rand
April 18th, 2024
This mermaid is a lovely gal and the colors are very zen and relaxing
Cinder Rand
April 18th, 2024
This card is fun. A lot going on but colors are lovely and brings joy
Cinder Rand
April 18th, 2024
A Diva indeed. What a happy card this is And I am a moon lover
Cinder Rand
April 18th, 2024
Sleeping on a dragon! My wish came true
Cinder Rand
April 18th, 2024
Love dragons this card was even better in person when it arrived.
First evidence existence of positron single track antiparticle of electron from California Institute of Technology; Cloud Chamber; adduced by C.D. Anderson's photo, 1932. Carl David Anderson (September 3, 1905 - January 11, 1991) was an American physicist. Under the supervision of Robert A. Millikan, he began investigations into cosmic rays during the course of which he encountered unexpected particle tracks in his (modern versions now commonly referred to as an Anderson) cloud chamber photographs that he correctly interpreted as having been created by a particle with the same mass as the electron, but with opposite electrical charge. This discovery, announced in 1932 and later confirmed by others, validated Paul Dirac's theoretical prediction of the existence of the positron. Anderson first detected the particles in cosmic rays. He then produced more conclusive proof by shooting gamma rays produced by the natural radioactive nuclide ThC into other materials, resulting in the creation...
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