What is the wavelength of a radio photon from an "am" radio station that broadcasts at 1120 kilohertz?
1 answer:
The wavelength of the radio photon is 268 m.
Electromagnetic waves travel with the speed of 3×10⁸m/s in vacuum. The speed of a wave <em>c i</em>s related to its frequency<em> f</em> and wavelengthλ as follows:
Thus the wavelength is given by,
Substitute 3×10⁸m/s for <em>c</em> and 1120×10³Hz for <em>f</em>.
Thus the wavelength of the radio photon from an AM station is 268 m
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The particle path will follow
(d) a circular path
Explanation:
When a charged particle having charge of magnitude '' enters into a magnetic field such that its velocity vector '
' is perpendicular to the direction of the magnetic field '
', then it will experience a force, called Lorentz force (
), given by
As shown in the figure, the magnetic field is directed perpendicular to the plane and towards the plane (as shown by the circle and 'X'-sign) and the velocity vector is from left to right on the plane.
According to the property of cross-product, the Lorentz force () acting on the particle will be perpendicular to the instantaneous position of the particle, making the path of the particle to be a circular path,as shown in the figure.
