Respuesta :

Answer:

D. v = f×3

Explanation:

if we look at it from the equation for the energy of a photon:

(1) E = hc/λ

(2) E = h×f

∴ (1) = (2):

⇒ f = c/λ....frecuency (Hz)

∴ c: velocity (m/s)

∴ λ: wavelength (m)

⇒ c = f×λ

If c [=] v and λ = 3

⇒ v = f×3