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অদৃশ্য কালি কলম - আপনার গভীরতম গোপনীয়তা গোপন রাখুন
Invisible ink pen contains a special type of ink made from naturally fluorescent chemicals or organic compounds. When you shine a UV light down on a message or drawing made with invisible ink, the electrons within the ink’s fluorescent molecules are excited, briefly shifting to a higher-energy orbit around their nuclei. When those electrons shift back to their normal orbit, the absorbed energy is expelled in the form of visible light.সর্বশেষ সংস্করণ 1.1.1 এ নতুন কী
Last updated on Oct 23, 2022
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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Invisible Ink Pen
1.1.1 by ExceptionBond
Oct 23, 2022