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enter image description here

  1. In the given picture,why has light been depicted so ? We know that light travels and propagates in a straight line in a given medium having the same refractive index throughout. enter image description here
  1. When we refer to the wavelength of light , do we refer to the wavelength of the wave-like pattern created by the oscillation of Electric field or Magnetic field ?
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1.) That rough sketch represents the amplitude of the electric or magnetic field, not the path the light follows.
2.) As the image shows, both fields have the same wavelength.

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