Discussion in 'US Coins Forum' started by Insider, Apr 8, 2022.
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Pretty hard to do with coins you are looking at on the internet CC.
Where should the light be placed to best see the hairline scratch?
If ya can't see the scratch then how do you know which direction is 90-degrees (perpendicular) to the scratch?
If you're asking where is the light in the picture that shows the scratch then the answer is 90-degrees...duh.
Cheers fellows..........it's Saturday nite! Is everybody lit?
The night is young dear fellow!
I'm working on it.
Maybe I'm misunderstanding you, but that seems exactly wrong to me. This scratch is from an object being dragged across the coin's face from top to bottom (or vice versa), but you'll see it most clearly if the light is coming from one side.
Unless you're talking about the force the scratching object exerts as it drives metal out of its groove to either side... but that's getting a little abstract, isn't it?
Actually, you answered the question already. When a scratch is parallel to the light it is not as easy to see (and as you can see) virtually disappeared under a 20X microscope. As soon as the light (or the coin) starts to rotate to the perpendicular position, the scratch jumps out. So Overhead is incorrect and 12 o'clock and 6 o'clock is incorrect in this case. EITHER 3 o'clock or 9 o'clock are correct answers. I tried to hide the fact that both positions are correct to get you to think about it more - with no luck.
slackaction1, posted: "First, I voted and don't know the answer. How do you define a scratch, hairline or sometimes a very fine scratch will not be obvious unless the coin is in a certain orientation to the light. [This is incorrect. Once you see the mark it can be defined. Everyone needs to learn the difference and because of subjectivity there is some overlap.]For most folks, hairlines are best seen in a dark room using a Fluorescent is best for microscopic exams. [Not true, while a stereo scope makes seeing thing easy an incandescent light in a dark room is the best way to search for HAIRLINES on a coin] I ALSO break rules and never follow instructions. [That could be a very big problem in life]will be back to find answer though!! to learn.."
Looks like 18 over 18
And for the poll, I would say from all angles, because a scratch can be in different directions
I don't think I'd do that if I were you . . . a Corgi's nose is a lot more sensitive than a human's.
Don’t get me started
I can relate to that. Cuz here I is
Look at the bottoms of 18 (1&8). They look notched
I’m 3:00 but more like 4:30. Hit the scratch angle. No 4:30 picks. Out of the box thinking like @Insider You could get really good at it.
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