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IF A TRAIN TRAVELS WITH SPEED OF LIGHT; WHAT HAPPENS TO ITS LENGTH?
Please refer to ther following links for more information on the question.
I was taught in school that magnetic lines can not cross each other without breaking. Also i was taught that magnetic field lines are unidirectional traveling out of the north end of the magnetic field and connecting to the south magnetic pole. My question is, In the event of the lines being broken, would the broken or open north magnetic lines coming out of the north pole of the magnetic field( traveling at the speed of 186,000 miles per second, the speed of light) be able to connect with any other south magnetic poles they encounter even a second or more away.thank you, Ron G.
What is the angle between the directions of acceleration and velocity at the highest point of projectile?
At the highest point of a projectile, the vertical component of velocity is zero and the velocity is entirely horizontal. The direction of acceleration (due to gravity) is vertically downwards throughout the motion of the projectile.
Therefore, the angle between the direction of acceleration and velocity at the highest point of a projectile is 90 °
What is the acceleration of the body m2 in the diagram below?
(The question was posted by Shuvam Shukla. Students and other visitors can post solution as comments to this post)
- Numerical problem from uniformly accelerated motion (askphysics.com)
- Download CBSE Physics Question Paper 2012 (plustwophysics.com)
- What you do today could affect what happened yesterday!! (plustwophysics.com)
- What is Higgs Boson? (plustwophysics.com)
- Numerical Problems from Kinematics (askphysics.com)
- Numerical from Laws of Motion (askphysics.com)
If vacuum has no mass …. then why isn’t a light beam accelerated in space ?? – Asks Akil Raj
The speed of light in a medium or in vacuum is constant. It is neither accelerated or decelerated while propagating. But, the speed of light in a (optically) denser medium is less than the speed of light in an optically rarer medium.
The speed of light is maximum in vacuum and it is constant and is equal to 299792458 m/s as theoretically established by electromagnetic wave theory too.
9If you look at it this way; “In vacuum there is no particle to oppose the propagation of light, therefore it should travel with a constant velocity, because to increase or decrease the velocity some external influence is essential)
As per 12th Physics textbook, it has been mentioned that according to Huygens wave theory of light, light does not travel in straight line.
But I have heard that it is wrong and rectilinear propagation of light is one of the merits of Huygens theory rather than demerit please clear my doubt
Asked by Mohammed Faiz Ansari
The wave nature of light becomes prominent only when the size of the aperture of the obstacle is comparable to the wavelength.
The light of wavelength λ coming through an aperture of width a can be considered to be in rectilinear motion up to a distance of
where ZF is called the Fresnel distance.
Thus, wavelength λ decreases, the limit for rectilinear propagation increases.This is the reason why we say, ray optics is valid when the limiting case wavelength λ tending to zero is applied.
if the papers of Einstein depend upon speed of light as its base, and the particles which have speed greater than the light could pose treat to be it. then in that case why cant that particle could be set as the Einsteins theorms base so that it doesnt violate and simple corrections could correct the theorms!!
- Original E=MC2 scribble posted online with huge Einstein archive¿ including love letters to his second wife and fanmail urging him to get his hair cut (dailymail.co.uk)
- Einstein, Insanity, Chaos, Order, Change, Growth (realestateeinstein.wordpress.com)