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Which effect would be absent in a planet without an atmosphere Attenuation Beam spreading Both of them will be absent Neither of them will be absent

Question

Which effect would be absent in a planet without an atmosphere

  • Attenuation
  • Beam spreading
  • Both of them will be absent
  • Neither of them will be absent
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Solution

Both of these effects, attenuation and beam spreading, would be absent in a planet without an atmosphere.

  1. Attenuation: This is the process by which the intensity of an electromagnetic signal, like light or radio waves, decreases as it passes through a medium. In the context of a planet, the medium would be the atmosphere. Without an atmosphere, there would be no medium to cause attenuation, so this effect would be absent.

  2. Beam spreading: This is the phenomenon where the diameter of a beam of light or other electromagnetic radiation increases as it travels away from its source. This happens due to the scattering and diffraction of the beam by the particles in the medium it's passing through. Again, in the context of a planet, this medium would be the atmosphere. Without an atmosphere, there would be no particles to scatter and diffract the beam, so beam spreading would also be absent.

So, both of these effects would be absent in a planet without an atmosphere.

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