Worksheet frequency/wavelength/Energy

[Hint: First, convert nanometers(nm) into meters by multiplying by 109] 6. What is the wavelength of X-rays having a frequency of 4.80 x 1017 Hz? 7. How long did it take Pioneer 10's radio signals, traveling at the speed of light, take to reach Earth from the distance of Pluto in April 1983, a distance of 4.58 x 1012 m ? ... ................
................