where 'c' is the speed of light in meters per second, the Greek letter lambda λ is the wavelength in meters and the frequency is in cycles per second. Also, the photon energy can be calculated by the formulas:

where 'e' is energy (joules), 'f' is frequency (cycles per second), 'h' is Planck's constant (6.6260695729 x 10-34 Joule*seconds) and wavelength λ is in meters. 表格的相互計算和歸納 Mutual Calculation Sheet: Tables for the calculation of mutual and self-induction 輸入已知數值再按單位鈕 INPUT Data Known ==> Now click one of these boxes Wavelength                   Frequency                   Photon Energy         The box below is NOT for input. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>>

I N S T R U C T I O N S This is what we call an ultra calculator, which means, you have multiple choices for input and output. For this calculator, you choose from 12 different units of input and the output is displayed in eight different units. For example, if you wanted to know the wavelength and photon energy of a 27 megahertz frequency, enter 27 in the "Input Amount" box, click on the MHz button, and you'll have wavelength and energy in 4 units each. Significant Figures >>> 為閱讀方便,有效小數點位數請自訂于上方空格 For easy readability, the answers are displayed in a "significant figure" format Numbers larger than 1,000 and smaller than .001 will be displayed in scientific notation and with the same number of significant figures specified. You may change the significant figures displayed by changing the number in the box above. Enter a zero in the box above to eliminate all formatting