Question

Question #5563e

Answer 1

The frequency is 4.4 × 10¹⁴ s⁻¹.

The wavelength λ is the distance between successive peaks in a wave.

The frequency `f` of a wave is the number of complete waves that pass a point in a given time.

The formula relating the frequency `f` and wavelength λ is

`fλ = c or f = c/λ`

where `c` is the speed of light.

In your case, `λ` = 680 nm = 680 × 10⁻⁹ m and `c` = 3.00 × 10⁸ m•s⁻¹.

∴ `f = c/λ = (3.00 × 10⁸ m•s⁻¹)/(680 × 10⁻⁹ m)` = 4.4 × 10¹⁴ s⁻¹