cheese_greaterFeb 8, 2024

What's the dumbest thing you thought as an adult that you recently learned was wrong?

https://lemmy.world/post/11718611

What's the dumbest thing you thought as an adult that you recently learned was wrong? - Lemmy.World

I just realized while cooking that a measuring-cup cup (as measured out as 250mL in a glass measuring cup) is the same as one of the actual baking measuring cups that go inside each other like Russian dolls lol I thought they were different somehow (something something imperial metric yadda yadda yaddda) Your turn to come clean Lemmings!

Show threadBjörnFeb 8, 2024

Until he was 50 years old my father did not know how his mother could see through walls.

When he was little his mother sat in the living room while he was playing with his sister in their playroom. With a wall and a hallway between them. But every time he tried to pull his sister’s hair or something their mother would shout from the living room for him to stop it. He was really angry and confused because he couldn’t fathom how she could see them.

On his 50th birthday his mother revealed that she could see them perfectly fine through the reflection in a wardrobe that stood in the hallway.

Show threadcheese_greaterFeb 8, 2024

mirror/reflection

Yep, that’ll do it, altho its weird he didn’t see her. Mirrors reflections are usually bidirectional, no? Like if I see you <-> you see me usually…

Show threadrdyoungFeb 9, 2024
It depends on the angle. There are definitely times you can see someone/something but they can’t see you.
Show threadOpafiFeb 9, 2024
What? Could you give an example?
Show threadpandacoderFeb 9, 2024

The reflection is only bidirectional if you can see the other person’s eyes.

It’s like if someone is in a bathroom stall. You could see the stall is occupied by seeing their feet stick below the wall of the stall, but they cannot necessarily see any part of you since their eyes are not where their feet are.

Same principle applies to reflections, where maybe the body part that you can see is just the top of the head, and since the person isn’t tall enough they can’t see that you can see them.

Show threadrdyoungFeb 9, 2024
Even when you can see their eyes that isn’t always the case. It depends on how sharp the angle is and where you and they are relatively speaking. You can definitely see their eyes without them seeing you.
Show threadOpafiFeb 9, 2024
Definitely not.
Show threadrdyoungFeb 9, 2024

Definitely yes. I’m amazed (but not surprised) by the lack of understanding of this concept.

I suggest that everyone here play around with mirrors and learn something themselves.

I’ll leave you with this. Why do mirrors work to see around corners when you are trying to not be seen?

Show threadwolfpack86Feb 10, 2024
You are wildly misunderstanding the effect at play. All this says is peoples brains are inherently misinterpreting the angles
Show threadrdyoung

I’m not misunderstanding anything. That was the first article that popped up that I thought might give some of you something to think about.

Maybe I did overestimate the mental strength of those here. I shall not make that mistake again.

And to repeat. Yes, you can see things in a mirror or other reflective surface without them being able to see you. I’m still amazed at the fact that no one here seems to understand that. Everyone here must have gone to public school in a red state where they make sure you don’t learn how to think for yourself.

Feb 10, 2024 at 1:27pmWeb
Show threadpandacoderFeb 10, 2024

You can see other people in a reflection without them being able to see you.

It is not possible to see someone else’s eyes (except from the side, so it’s only seeing their eyes in profile) in a reflection without them being able to see you too.

It’s literally not possible via reflection, as everything is equal and opposite. If light can go from their eyes to yours, it’s also possible to go the opposite direction.

This is what everyone has been saying but instead of thinking through everything clearly, you resorted to bullying.

The only way to accomplish this one-way vision is by adding something that is not reflection to the system (like a one-way window), but that’s breaking the premise under which everyone else has been commenting in good faith.

Show threadrdyoungFeb 11, 2024

I didn’t bully anyone and I tried my best to avoid going down the rabbit hole of nuance that is seeing the whites or sides of someone’s eyes.

You lot are turning lemmy into reddit. Your bringing in the pedantic bullshit by people who don’t know what they don’t know. I guess I’ll go back to being a passive reader because you folks just can’t handle real conversations. I really wish I could find some place online without people who see being told they are wrong as bullying or being attacked. You folks are who the maggats are talking about when they call people snowflakes. Sometimes words are just words and the only meaning behind them is the actual dictionary definition.

Show threadOpafiFeb 11, 2024
Dude, calm down. It’s just a discussion. Just give us an example of how I could see somebody’s eyes in a mirror without them seeing my eyes and we’ll all be amazed at how you were right all along.