Question

if you know the energy of the photon, what equation will you use to calculate the frequency of the light? c = λv e = hv e = hc/λ

Explanation:

• In the equation \(E = h

u\), \(E\) represents the energy of the photon, \(h\) is Planck's constant (\(h = 6.626\times10^{-34}\space J\cdot s\)), and \(
u\) is the frequency of the light. If we know \(E\) (energy of the photon) and \(h\) (a known constant), we can solve for \(
u\) (frequency) using the formula \(
u=\frac{E}{h}\).

• The equation \(c = \lambda

u\) relates the speed of light (\(c\)), wavelength (\(\lambda\)), and frequency (\(
u\)) of light, but it does not involve the energy of the photon.

• The equation \(E=\frac{hc}{\lambda}\) relates energy (\(E\)), Planck's constant (\(h\)), speed of light (\(c\)), and wavelength (\(\lambda\)), but it is not directly used to find frequency from energy as it still has the wavelength variable.

Answer:

B. \(E = h
u\)