Recent content by rishch

So I asked her and turns out that what she was plotting was just the magnitude of the displacement on y and time on x.

Sorry but didn't get the first para at all. But that's okay, as I go to higher classes I'll learn it, so I won't confuse myself now.:smile: But as for the second part would that mean that the magnitude would be negative for a vector in the opposite direction to ix? I think I read somewhere the...

She didn't use angular velocity, she just took the initial point and drew displacement vectors from there to points on the circle.

I'm just in Year 10, I haven't learned linear algebra. I don't know what ℝ2 or arctan is either. I don't think I need the formulas, right know I just want to understand the concept. What I've got so far is that to represent direction of a vector in 2D You either use angle with the x-axis or...

Thanks you so much for your replies! :biggrin: n-dimensions :confused: n can only be 1,2 or 3 right? Also, I have no idea what you mean when you say vector space or linearly independent or what basis you are referring to. But I can always guess :-p vector space I suppose this means the...

I just learned vectors as a prerequisite to learning mechanics and I have a few doubts:- 1) For 1D motion, there are only two possible directions, so they can be represented by just a + or - sign, where you have to define which direction is positive and which is negative. But for 2D how...

In astronomical telescopes, they use a convex mirror to from a real image, which is formed at the focus of the eyepiece lens, effectively forming an image at infinity. But how can it truly be at infinity? If it was truly at infinity then how could you see it? Also they say that image at infinity...

I don't have a fishtank so I can't do that. But I'm happy to know that I was correct about it :biggrin: For once :-p

I don't have a telescope to be playing around with so I can't be trying all this out :/ But as for the images getting brighter, here's what I think:- You're using a convex lens to form a real image which is captured on a screen. I get how the image on the screen will be brighter if you increase...

In one place I read that since the particles are big they reflect white light as is. But in another I read that they are made up of water droplets of varying sizes so, small droplets: make blue medium droplets: make green larger droplets: make red ...and together they combine to make a white...

Oh sorry I didn't see your post. So basically the shift is so small that the lights just merge together for us?

Another explanation given in another book says that if you cur it along the diagonal you can imagine it to be two prism and you already know how recombination occurs with two prisms. But in the two prism arrangement refraction occurs when going from the first prism to air and from air to the...

Because it's closer to you. Just like the trees right? The size of the image on the retina is bigger.

But it appears to be bigger and that's what angular magnification is. Just like trees farther away are smaller, or railway tracks converge at the horizon.

Well...?