An optical lens can only bend light, not make something appear. An optical filter might help, but only under certain lighting conditions.
Well, honey, in an invisible ink experiment, the dependent variable is the thing you're measuring to see if it changes as a result of the invisible ink being used. So, it could be something like the visibility of the message under different conditions. Just remember, the dependent variable is the one that's dependent on the independent variable - it's like the sidekick to the main character in a cheesy detective show.
no cows do not make ink they make milk.
MICR stands for Magnetic Ink Character Recognition. OCR stands for Optical Character Recognition. The former uses magnetic ink, the latter doesn't.
There is a special tree in India, and it has some kind of balls on it, and if you smash it you will get ink, so that's how you make Indian ink.
a continuously variable signal. it could be electronic, mechanical, hydraulic, optical, etc.
The dependent variable of the Stroop effect is typically the time it takes for an individual to correctly identify the ink color of the written word in a Stroop task. This time is used to measure the interference caused by the conflicting information between the color word and the ink color.
I think they used plants and minerals for ink.
the optical telescope has discovered objects on earth and in space
They need ink to make them work.If there is no ink in it,it will not work.Its the same as asking; Why do pens need ink to work? Its pretty obvious.
you can only get it from a squid... sorry... you cannot make a squid ink...
Molotow ink is a proprietary brand of spray paint and markers. The specific formula and ingredients used to make Molotow ink are not publicly disclosed by the manufacturer. It is recommended to purchase Molotow ink directly from authorized retailers to ensure quality and authenticity.