This gives the meaning of the terms as generally understood in the middle of the 18th century. Robert Hooper's Physician's Vade-Mecum, published in 1812 has been used as a source of terms in the early 19th century; many of the terms mentioned are still in common use.
In either case, the value at x = 0 is defined to be the limiting value sinc(0) = 1. The normalization causes the definite integral of the function over the real numbers to equal 1 (whereas the same integral of the unnormalized sinc function has a value of Ï).
Now, as I said before, c is a constant, but so is h. Their values are 3.0 X 108 m/s and 6.63 x 10-34 Js, respectively. Thus, plugging in the value in question for Î», 452 nm, or 452 x 10-9 m, we get: 6.63 x 10-34 Js * 3.0 x 108 m/s / 452 x 10-9 m, which equals 4.4 x 10-19 J, or 2.75 eV. 1 person found this useful.dditionally, the speed of a photon of light is given by the following equation, c = fÎ», where c is the speed of the photon, which is constant in a vacuum, and Î» is the wavelength of the photon. Therefore, f = c/Î».