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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Issac Newton
William Herschel
Joseph van Fraunhofer
Edwin Hubble
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flagFrance
6%
13%
80%
0%
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flagthe Philippines
17%
17%
53%
10%
28
flagRepublic of Ireland
14%
21%
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14%
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flagIndia
13%
22%
48%
14%
320
flagAustralia
3%
26%
42%
26%
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flagUnknown
8%
16%
41%
33%
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flagthe United States
12%
35%
38%
12%
164
flagPakistan
5%
22%
38%
33%
18
flagGreece
7%
15%
38%
38%
13
flagGermany
14%
24%
35%
25%
121
flagthe United Kingdom
12%
29%
33%
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72
flagPoland
17%
23%
31%
26%
7540
flagAustria
7%
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30%
19%
26
flagCanada
20%
26%
26%
26%
15
flagthe Netherlands
16%
25%
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33%
12