WHAT IS THE FREQUENCY?

c / λ = f

Speed of light (m/s) / wavelength (m) = frequency (1/s; Hz) 299,792,458 (m/s) / (m) MHz

Calculate the frequency for these wavelengths of light:

λ = 700 nm (Red light): Enter "0.000000700" or "700e-9" ("700e-9" stands for "700 exponent of -9", or 700 × 10-9) λ = 590 nm (Orange light): Enter "0.000000590" or "590e-9" λ = 570 nm (Yellow light): Enter "0.000000570" or "570e-9" λ = 510 nm (Green light): Enter "0.000000510" or "510e-9" λ = 475 nm (Blue light): Enter "0.000000475" or "475e-9" λ = 445 nm (Indigo light): Enter "0.000000445" or "445e-9" λ = 400 nm (Violet light): Enter "0.000000400" or "400e-9"