Question: This method involves coating LEDs of one color (mostly blue LEDs made of InGaN) with phosphors of different colors to form white light; the resultant LEDs are called phosphor-based or phosphor-converted white LEDs (pcLEDs). A fraction of the blue light undergoes the Stokes shift being transformed from shorter wavelengths to longer. Depending on the color of the original LED, phosphors of different colors can be employed. If several phosphor layers of distinct colors are applied, the emitted spectrum is broadened, effectively raising the color rendering index (CRI) value of a given LED.
Try to answer this question if possible: What method involves coating LEDs of one color with phosphors of different colors?
Answer: phosphor-converted white LEDs (pcLEDs)
Question: Uranium ore is mined in several ways: by open pit, underground, in-situ leaching, and borehole mining (see uranium mining). Low-grade uranium ore mined typically contains 0.01 to 0.25% uranium oxides. Extensive measures must be employed to extract the metal from its ore. High-grade ores found in Athabasca Basin deposits in Saskatchewan, Canada can contain up to 23% uranium oxides on average. Uranium ore is crushed and rendered into a fine powder and then leached with either an acid or alkali. The leachate is subjected to one of several sequences of precipitation, solvent extraction, and ion exchange. The resulting mixture, called yellowcake, contains at least 75% uranium oxides U3O8. Yellowcake is then calcined to remove impurities from the milling process before refining and conversion.
Try to answer this question if possible: What percentage range of uranium dioxide is usually contained in low-grade uranium ore?
Answer: unanswerable
Question: The fairs held at the shrines of Sufi saints are called urs. They generally mark the death anniversary of the saint. On these occasions devotees assemble in large numbers and pay homage to the memory of the saint. Soul inspiring music is played and devotees dance in ecstasy. The music on these occasions is essentially folk and appealing. It forms a part of the folk music through mystic messages. The most important urs are: urs of Data Ganj Buksh at Lahore, urs of Hazrat Sultan Bahu at Jhang, urs of Hazrat Shah Jewna at Jhang, urs of Hazrat Mian Mir at Lahore, urs of Baba Farid Ganj Shakar at Pakpattan, urs of Hazrat Bahaudin Zakria at Multan, urs of Sakhi Sarwar Sultan at Dera Ghazi Khan, urs of Shah Hussain at Lahore, urs of Hazrat Bulleh Shah at Kasur, urs of Hazrat Imam Bari (Bari Shah Latif) at Rawalpindi-Islamabad and urs of Shah Inayar Qadri (the murrshad of Bulleh Shah) in Lahore.
Try to answer this question if possible: What are Sufi saints called?
Answer: unanswerable
Question: A 2013 trans-genome study carried out by 30 geneticists, from 13 universities and academies, from 9 countries, assembling the largest data set available to date, for assessment of Ashkenazi Jewish genetic origins found no evidence of Khazar origin among Ashkenazi Jews. "Thus, analysis of Ashkenazi Jews together with a large sample from the region of the Khazar Khaganate corroborates the earlier results that Ashkenazi Jews derive their ancestry primarily from populations of the Middle East and Europe, that they possess considerable shared ancestry with other Jewish populations, and that there is no indication of a significant genetic contribution either from within or from north of the Caucasus region", the authors concluded.
Try to answer this question if possible: What did the 2013 trans-genome study find in regards to Ashkenazi Jews and Khazar origins?
Answer:
found no evidence of Khazar origin among Ashkenazi Jews