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प्रश्न
Name the scientist who discovered Infra-red waves
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उत्तर
Hershell
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संबंधित प्रश्न
The wavelengths for the light of red and blue colours are roughly 7.8 × `10^7` m and 4.8 × `10^7` m respectively.
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(b) Which colour has the greater speed in glass?
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