Who invented the spectroscope?
Issac Newton
William Herschel
Joseph van Fraunhofer
Edwin Hubble
Joseph Ritter von Fraunhofer was a Bavarian physicist and optical lens manufacturer. He made optical glass and achromatic telescope objective lenses, invented the spectroscope, and developed diffraction grating.
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Answers by country
Issac Newton
William Herschel
Joseph van Fraunhofer
Edwin Hubble
answers
France
20
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22
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40
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39
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28
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13
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13
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454
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251
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14
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12
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74
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15
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440
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137
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22
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14
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8956
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24
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39