If a photon's wavelength is 663 nm, what is its frequency? (Speed of light c = 3.00 × 10^8 m/s)

Given that the energy of a mole of photons is 1.91 \(\times\) 10^6 \(\text{ J}\), what is the wavelength in nanometers of the light? (Planck's constant h = 6.626 \(\times\) 10^{-34} \(\text{ J}\) \(\cdot\) \(\text{s}\), speed of light c = 3.00 \(\times\) 10^8 \(\text{ m/s}\), Avogadro's number N_A = 6.022 \(\times\) 10^{23} \(\text{ mol}\)^{-1})

Which of the following best describes the relationship between the frequency (ν) and wavelength (λ) of light?

Given that the energy of a single photon is 2.23 × 10^{-21} J, what is the frequency of the light? (Planck's constant h = 6.626 × 10^{-34} J·s)

What is the frequency (s^{-1}) of light that has a wavelength of 1.23 \(\times\) 10^{-6} cm? (Speed of light, c = 3.00 \(\times\) 10^{10} cm/s)

What is the frequency (in Hz) of light that has a wavelength of 249 nm? (Use the speed of light, c = 3.00 × 10^8 m/s.)

Given that the energy of a photon is 4.38 × 10^{-18} J, what is its frequency (s^{-1})? (Planck's constant h = 6.626 × 10^{-34} J·s)

When measuring absorbance of a solution using a colorimeter, at which wavelength should the colorimeter be set?

Each line in an atomic emission spectrum represents the energy: