What is the energy of photon whose wavelength is `6840 Å` ?

What is the energy of a photon whose wavelength is 6840 Å ?

What is the energy of a photon of wavelength 6000Å

What is the energy of photon of wavelength 24800 Å ?

What is the energy of photons with a wavelength of 434 nm?

The ratio of the energy of a photon of wavelength 3000 "Å" to that of photon of wavelength 6000 "Å" is :

Calculate the ratio of the energy of a photon of wavelength 3000 Å to that of a photon of wavelength 6000Å respectively

Calculate the ratio of the energy of a photon of wavelength 3000 Å to that of a photon of wavelength 6000Å respectively

What is the energy associated with photons of wavelength 4000 A?