#Optics experiment

[rajansmoorthy]

Experiment: Determination of Focal Length of a) Convex Lens b) Concave Mirror by Obtaining the Image of a Distant Object

Focal length of a convex lens & Concave Mirror: a). Focal length of a convex lens: Objective: To determine the focal length of a convex lens using a distant object (like a sun, tree or tall faraway building). Principle: A convex lens converges parallel rays of light (from a distant object) to a point called principal focus (F). The distance between the optic centre (O) of the lens and the…

[johnnyshrine]

★ 080 // “Wavy Checkerboard”

[merrymorningofmay]

i mean you really don't need to dig deep to "prove" that malevolent is a queer story. loving a disembodied entity to the point of bodily self-sacrifice is queer. loving while disembodied/existing in another person's body is queer. arthur and john are friends canonically but that's not the kind of relationship you, a real person, have with a friend, or a lover, or family; it's a different dynamic, different kind of intimacy, etc (key word "different", not "more/less")

it's not even a matter of either one's gender or of whether they ever kiss or not. their love already doesn't fit into any paradigm or mold. it's already queer

[tabieeee]

the chief engineers have great assets- I mean are great assets

[afrenomes]

I really can’t stand seeing other Jews on here spreading misinformation about the “protesters” (honestly we should start calling them rioters or even militants—it’s what they call themselves), and their posts getting 9k+ notes, meanwhile Jewish students and NYC Jews are screaming into the void about who these people ACTUALLY are and our posts hardly even break 100 notes, with even half of Jumblr ignoring us, saying we’re exaggerating when we say what’s happening on campuses is THAT BAD, or saying that our civil rights (which are required to be protected under the law!) matter less than a person who’s violating their green card agreement facing the same legal consequences based on the same law that Biden used against violent West Bank settlers back when he was president

[clownswithshoes]

The main inventor and scientist of the Autobot crew, Wheeljack!!!!

[astrantiia]

april 29 | tuesday

spend almost the whole day programming

first, I worked on color diagrams for my thesis. then, in our programming class, we made this cute picture of a cat

in the physics in nature class, we talked about light and teacher showed us some cool experiments

and after that, I went to the square where they were showing the hockey playoff final and our city’s team won! 🥳

[itsyaboyeric]

Late Night Radical-Constructivist Rambling

I believe in a few 'radical' (read: not popular) ideas regarding the self, the nature of being, reality, and consciousness. One such idea I hold in high regard is that reality is constructed by the senses, but what does that actually mean? What, in abstract, am I really getting at? Am I saying that we make up reality as we go along and that everything is fake? No, not quite.

(cont.)

To elaborate in a semi-reductive way: imagine the brain and its functions while putting a pin in the above text. In my view, the brain acts as a reality interpreter.

Think of your eyes and vision. You might say, "I can confirm with someone else that we're seeing the same thing." (i.e; a 'red' apple)

And that's true, relatively speaking. You and an outside observer can correspond and compare truths to reach a shared truth: we both perceive the apple as being red. (This concept, generally, is known as the correspondence theory of truth)

But what happens when you look at an optical illusion? Let's say that you're on your phone and see a post regarding a dress that asks what color(s) the dress is: black and blue or gold and white?

My friend might say the dress is blue and black whilst at the same time I perceive it and whole heartedly believe that it's gold and white. Some of the more clever among you might respond to this by saying we can check the hexadecimal color value(s) of the image, which is true. But consider that hexadecimal color is based upon the visible spectrum of light that we (you, I, others) are able to perceive. Is someone who is wholly colorblind wrong if they point out that the dress is actually gray and black? Because they can't perceive the same colors that you and I can?

"Yes!" I can hear the contrarians among you say. Well, alright, let's play that game.

Hypothetically, what if everyone were varying levels of colorblind, and only you and a minuscule percentage of people could see the light spectrum that non-colorblind people can see?

What if they used your logic there and said, "Actually, a majority of people see that it's gray. If we check with hexadecimal color, we can see that it's #00FFFF; objectively extremely gray!"

I hope you see the problem here and where the correspondence theory of truth falls apart.

This line of reasoning is known as The Knowledge Argument, which is often synonymous in conversation with Mary's Room. You can read more about it here (link to Standford Encyclopedia of Philosophy).

Digressing back to my earlier point about the senses and how the brain constructs reality:

By empirical comparisons of this manner on this matter, we can come to realize that what we perceive is not how reality appears, but rather how it appears relative to us. (And our senses.)

Back to optical illusions: surely you've seen a few. Take for example The Checker Shadow illusion (Wikipedia link)

The two squares are the same color. Yes, your eyes and brain are fooling you. Why is this? Well, to put it simply, your brain (the aforementioned reality interpreter) unconsciously takes the qualia (the subjective experience/phenomenon of viewing the illusion) and fills in the gaps based upon contextual information available to you. Thus, resulting in your perception of the squares being different colors.

The brain does this constantly in our day to day lives. And it isn't limited to optical illusions. Olfactory, tactile, auditory, and gustatory illusions all exist. Getting a little spooky, isn't it?

So, we've arrived at a point where we can agree at a minimum that the brain constructs reality based upon our senses. But what about the truth? Before I open that can of worms, let me posit another question to you:

When you perceive daylight and your friend in Australia perceives nightlight, which one of you is correct? And which one of you is lying?

If you believe in an objective truth, then this question will stump you. You'll tell me that I'm being fallacious in my reasoning, but that's not the case. You're encountering a problem here where you're inducting objectivity onto a problem with no objective answer.

The truth in this case, and pertaining to the question, is both dynamic and relative. Your friend isn't lying, and neither of you are incorrect. The truth relative to you is that it's daytime. The truth relative to your friend in Australia is that it's nighttime. The truth is dynamic in that it will eventually shift; you will eventually experience nighttime after experiencing daytime, and your friend will experience daytime after nighttime. Neither of you will experience them at the same time unless one of you moves elsewhere to the same time zone.

Again, neither lying or incorrect.

This is the essence of what I'm getting at. Your reality and how you experience it is just as valid as any other person's, even if you have fundamental disagreements as to the nature of reality and your contrasting perceptions.

In closing: I believe that this posits many questions about the very nature of being and consciousness, and that the world as we experience it is not as black and white as various figures claim it to be. Your experience of the world is just as valid as anyone else's and vice versa.

"There are no facts, only interpretations" —Friedrich Nietzsche.

(If you made it this far, thank you very much for reading. Any and all feedback is appreciated! 🖤🦝)

[tvmblrsillyman]

Dan Hays - Colorado Snow Effect (2008) - Oil on canvas

(Reposting this after the original poster [likeafieldmouse] of the original post has deactivated and the post itself got flagged as explicit, making it unlikely that Staff will reinstate the post, let alone be able to share it. Click the link and check the artist out. It's a whole series of paintings and there's more of them on the same concept!)

[rajansmoorthy]

Experiment: To Determine the Focal Length of a Convex lens by Plotting Graphs Between u and v and 1/u and 1/v

Focal length of a convex lens: Objective To find the focal length of a convex lens using the lens formula by plotting u and v graph 1/u and 1/v graph Focal length of a convex lens: Apparatus and Material Required Convex lens (let’s assume f=10 cm) Optical bench with 3 uprights (with clamps) Optic needles Meter scale Spirit level  Focal length of a convex lens: Ray Diagram Focal length of a convex…

[ef-1]

girlhood

[strollsroyce]

i regret to inform the chat that the prep cook i have a crush on is (a) married (or essentially so), and (b) breathtakingly gorgeous out of uniform

[son-of-avraham]

Were you out as trans to the Rabbi who managed your conversion? I'm Jewish and trans too (from birth tho), and I'm interested to know how it worked for you

I'm still in the process, but I have so far not told anyone about my being trans. I don't know... I just don't feel as though I need to qualify my manhood, if that makes sense. I've been finding in many of the largely cishet jewish spaces that I'm in that I feel more accepted even when I'm stealth than when I'm in non-jewish cishet spaces, so I really don't find it that big of a deal to make it Known. Obviously, it may be different when it comes to my rabbi, and it'll likely come up because I want to look into maybe an alternative to a brit (not out of requirement, out of my own want)... If you couldn't tell, I'm still trying to figure out what I want haha!

I guess the long and short of it is... It just works for me? It's rather boring the way it's been for me, and for that, I really am grateful. I know it's not the same for everyone, and I want to make it clear that this can absolutely coexist with having a really boring, uneventful experience with this.

[marc--chilton]

(adam and lawrence watching star wars)

adam in the middle of the bit where the space buffalo gets gutted for shelter: i think about doing that to u sometimes. btw.

lawrence, internally: god i can't not fuck him

[kingofmyborrowedheart]

If you’re so disillusioned with who Taylor is as a person and believes she’s changed for the worse, why are you still here as a fan? If you believe her “activism” isn’t up to your standards, are tired of her not using her platform, see her as an uncaring and callous billionaire, why are you still here and engaging in fan spaces if you’re no longer enjoying her and her work? Just disengaging completely if that’s the case; find something or someone else to pour your time and energy into.

[lindahall]

Isaac Newton – Scientist of the Day

Since Dec. 28 has only a few good anniversaries, and we have already written about all of those, we thought we would go back a few days and celebrate someone born on Christmas Day.

Learn more