Answer
A) $3.7\times10^{2} nm$
B) Ultraviolet Region
C) $E= 5.37\times10^{-19} J$
Work Step by Step
A) $(3x10^{8} m/s)/(8.11x10^{14} m/s)$
B) Ultraviolet region of the electromagnetic spectrum
C) $E= (6.626 x 10^{-34} J x s)(8.11 x 10^{14} s)$