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JEE Main 26 Feb 2021 Shift 1 Solved Paper

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Question : 18

Total: 90

LED is constructed from GaAsP semiconducting material. The energy gap of this LED is 1.9eV. Calculate the wavelength of light emitted and its colour.
[h=6.63×10−34Js and c=3×108ms−1 ]

[26 Feb 2021 Shift 1]

1046nm and red colour
654nm and orange colour
1046nm and blue colour
654nm and red colour

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