J.R. S. answered 07/13/22
Ph.D. University Professor with 10+ years Tutoring Experience
Given the frequency (f) and asked to find the wavelength (w), we can use
c = fw
c = speed of light = 3x108 m/sec
f = frequency = 3.82x1020 Hz = 3.82x1020 sec-1
w = wavelength in meters
3x108 m/sec = (3.82x1020 sec-1)(w)
w = 3x108 m/sec / 3.82x1020 sec-1
w = wavelength = 7.85x10-13 m