Continuity of Magnetic Field Lines
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.
Categories: Ask Physics Tags: Aurora, earth, electromagnetism, magnetic field, north pole, physics, South Magnetic Pole, speed of light
Angle between acceleration and velocity in projectile motion
What is the angle between the directions of acceleration and velocity at the highest point of projectile?
Answer:
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 °
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Categories: Ask Physics, KINEMATICS, Problems Tags: acceleration, kinematics, Ohm's law, physics, projectile, speed of light, vacuum, velocity
Motion of connected system – A numerical problem
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)
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Why light is not accelerated in vacuum?
If vacuum has no mass …. then why isn’t a light beam accelerated in space ?? – Asks Akil Raj
Answer:
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)
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Categories: Ask Physics, Interesting Questions Tags: Albert Einstein, Electromagnetic radiation, Gran Sasso d'Italia, light, OPERA experiment, physics, speed of light, vacuum
