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1. |
What is the wavelength band for Ultraviolet rays? |
A. | 1 * 10 -6 to 3.9 * 10 -1 micron meter |
B. | 1 * 10 -4 to 3.9 * 10 -1 micron meter |
C. | 2 * 10 -3 to 3.9 * 10 -1 micron meter |
D. | 1 * 10 -2 to 3.9 * 10 -1 micron meter |
Answer» E. | |