1.
The value of Planck's constant is 6.63×1034Js6.63 \times 10^{-34} Js. The speed of light is 3×1017nms13 \times 10^{17} nms^{-1}. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6×1015s16 \times 10^{15} s^{-1}?