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The device can evaluate how ripe the fruit is by measuring the glow of chlorophyll in the fruit’s skin under ultraviolet light. You may soon be able to tell if a fruit is ripe or not, thanks to a new handheld device developed by MIT researchers, including one of Indian origin.
Testing ripeness could also help farmers decide the best time to harvest their crops. The riper an apple is, the dimmer the glow from the chlorophyll, the researchers said.