Question

Humans have three types of cone cells in their eyes, which are responsible for color vision. Each type absorbs a certain part of the visible spectrum. Suppose a particular cone cell absorbs light with a wavelength of 549.nm. Calculate the frequency of this light. Be sure your answer has the correct number of significant digits.

Answer 1

5.46 x 10¹⁴ Hz

Step-by-step explanation:

The relation between frecuency (ν) and wavelength (λ) is given by:

c = λν

Where c is the speed of light and it is constant: 2.998 x 10⁸ m/s.

Given: λ = 549 nm x 10⁻⁹ m/1 nm = 5.49 x 10⁻⁷ m

We calculate the frequency of the light as follows:

ν = c/λ = (2.998 x 10⁸ m/s)/(5.49 x 10⁻⁷ m) = 5.46 x 10¹⁴ s⁻¹ = 5.46 x 10¹⁴ Hz