It is similar to the solar system because it predicts that the electrons orbit the nucleus just as the planets orbit the Sun.

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Sunlight is visible part of electromagnetic radiation the sun emits that comes to Earth. Sun radiates as a black body, thus giving off a continuous range of frequencies resulting in continuous range of colors in the visible part. On the other hand radiation coming from hydrogen atom is a result of predetermined atomic transitions (electrons are jumping from shell to shell) and thus produce discrete values of frequencies resulting in only certain colors making appearance in the spectrum.

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Rutherford’s model predicts that electrons are moving around the nucleus in circular orbits. Since every circular motion is accelerated (due to centripetal acceleration) the electron would radiate energy in the form of electromagnetic waves as a charged particle that accelerates. This would result in two things:

1) The electron would loose energy and spiral down to the nucleus and thus atoms would be unstable.

2) While spiraling down it would radiate different frequencies (equal to the current orbiting frequency of the electron) which would result in continuous specter.

This does not meet the experimental data that firmly shows that atom is stable and specter is continuous.

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The bright lines of emission spectrum exactly match dark lines on atom’s absorption spectrum.

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