Recent content by ViolentCorpse

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    Graduate Relativity of motion and astronomy

    Thank you, Nugatory. I understand now. That made me chuckle. Good one! :D
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    Graduate Relativity of motion and astronomy

    Hello again everyone, I had a follow-up question of sorts. I was thinking about the frame of reference of Earth and Newton's laws and did some calculations. In the Earth's frame of reference, the sun orbits the Earth. I used Newton's law of gravitation to find the force of attraction between...
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    Graduate Relativity of motion and astronomy

    Thanks, Ibix. I knew I was missing something. Appreciate it! ^_^
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    Graduate Relativity of motion and astronomy

    Greetings, One of the basic postulates of relativity is that the laws of physics hold equally well in all frames of references. This got me wondering about the geocentric model of solar system which necessarily gives rise to motions of peculiar kinds. For example, the epicycles, which are...
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    Undergrad Why does absorbed radiation get re-emitted at a different frequency?

    Thank you, people. Your posts have been very helpful! Appreciate it a lot!
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    Undergrad Why does absorbed radiation get re-emitted at a different frequency?

    Greetings, Is there a difference between reflection of radiation and emission after absorption? What causes this difference? Another related question: According to wikipedia: "Earth's surface and the clouds absorb visible and invisible radiation from the sun and re-emit much of the energy as...
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    Undergrad Does centripetal force apply to projectile motion as well as orbits?

    Thank you so much! :)
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    Undergrad Does centripetal force apply to projectile motion as well as orbits?

    Makes perfect sense! Thanks so much! :) There's just one more thing I must ask: Is the centripetal force less than the force due to gravity when the curve of a projectile is parabolic, equal to gravity when it is circular and greater than gravity when it is elliptic?
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    Undergrad Does centripetal force apply to projectile motion as well as orbits?

    Interesting! There is, however, a radius term in the formula of centripetal force. What could be the radius of a parabola?
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    Undergrad Does centripetal force apply to projectile motion as well as orbits?

    Hi, The force of gravity is the centripetal force when an object is in motion. But in projectile motion, where the speed is not enough to keep it in orbit, could the force of gravity be equated to centripetal force? I'm trying to understand if all types of curved motion can be explained by...
    • ViolentCorpse
    • Thread
    • Centripetal Centripetal force Force Motion Orbital Orbital motion
    • Replies: 6
    • Forum: Mechanics
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    Graduate Does refractive index vary for different wavelengths like X-rays?

    1) Yes refractive index of a material varies with wavelength of the radiation incident on it. Can't answer the 2nd question.
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    High School Why triangulation gives different angles for objects with equal apparent size

    Thanks a lot guys! :)
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    High School Problem understanding magnification

    Thanks a ton, Drakkith! You are awesome!
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    High School Why triangulation gives different angles for objects with equal apparent size

    Yeah I probably don't. So, you're saying that two different objects located at different distances will form different angles (if we select a fixed point on each object for making the measurements) irrespective of their apparent size?
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    High School Problem understanding magnification

    Oops. I mistook focal length for power. Thanks again, Drakkith! There are a few unrelated questions I want to ask. Answer them only if it in no way imposes on you, please. 1. Do spectacles form virtual images? Or do they just help focus a real image on the retina? 2. An object placed at the...
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