High-order rainbows, up to the 200th order, formed by a pendant water drop and a 50-mW laser beam, have been observed. Some of the characteristics of the high-order rainbows, including angular intensity distributions and angular positions, are reported. Rainbow intensity as a function of order number is also presented. Rainbows beyond the 32nd order have been observed for the first time to our knowledge. Experimental and theoretical results are in reasonable agreement.
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