Photons and Photon Energy Practice Test

The first four energy levels of a hydrogen atom have the energies given above. If a hydrogen atom is initially in the n = 2 state, photons of which of the following energies could be absorbed?

Light is passed through a prism to separate the wavelengths, and red, green and blue portions of the spectrum are sequentially projected onto a photo-electric surface connected to an electrical circuit. Which of these observations is correct?

1. Red light, but not green or blue light, will generate an electric current.
2. Red light and blue light, but not green light, will generate an electric current.
3. Green light, but not red or blue light, will generate an electric current.
4. Blue light, but not red or green light, will generate an electric current.
5. All the frequencies will generate an electric current if the intensity is adequate.