In a television picture tube, a beam of electrons is sent from the back to the front (screen) by an electron gun. When an electron strikes the screen, il causes a phosphor to glow briefly. To produce an image across the entire screen. the beam is electrically deflected up and down and left and right. The beam may sweep from left to right at a speed greater than c. Why is this not a violation of the claim that no information may travel faster than the speed of light?
As light contains massless particles like photons, that is one of the main reasons no other information may travel faster than the speed of light.
The speed of light is described as the number the light travels in one second. The light travels about 299792458 meters per second.
If there are two events such as hitting a screen at different positions which usually does not have any kind of effects. Apart from that, while the transition, no other information has been transferred as a beam do not have a physical identity. Hence, exceeding the light’s speed is not a special relativity’s violation.
Thus, as light contains massless particles like photons, that is one of the main reasons no other information may travel faster than the speed of light.
At rest, a light source emits light. (a) As it moves along the line connecting it and Earth. observers on Earth see . What is the source's velocity (magnitude and direction)? (b) Were it to move in the opposite direction at the same speed. what wavelength would be seen? (c) Were it to circle Earth at the same speed. what wavelength would be seen?
An object of mass moves to the right at .
a) Calculate its momentum and energy.
b) Using the relativistic velocity transformation, determine its velocity in a new frame of reference moving it to right at , then using it to determine the object's momentum and energy in this new frame.
c) Verify that equations role="math" localid="1657556434416" are satisfied.
94% of StudySmarter users get better grades.Sign up for free