hydrogen atom emits radiation as a result of an electron transitic y level. Determine the highest frequency possible due to this tra emits a series of lines that lie in the visible part of the spectrum on ends up inn = 1 level, prove that the atom emits a serie %3D ength that are not in the visible part of the spectrum.

In designing an experiment, you want a beam of photons and a beam of electrons with thesame wavelength of 0.281 nm, equal to the separation of the Na and Cl ions in a crystal ofNaCl. Find the energy of the photons and the kinetic energy of the electrons in electrovolts(eV).

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What is the total emittance of a cesium lamp at 2473.15 K with a lambda max of 1171.38 nm at this temperature.

The most common fluorescent lightbulbconverts ultraviolet light from mercury atoms to white light. If anultraviolet photon of wavelength 185 nm is emitted by a mercuryatom and absorbed by the phosphor, what is the maximum number of red 655-nm photons that the phosphor can emit?

What is the energy in ev and wavelength in um of a photon that, when absorbed by a hydrogen atom, could cause a transition from the n = 5 to the n = 8 energy level? HINT (a) energy in ev ev (b) wavelength in um um

Experiments have shown that the nervous system of the human eye effectively takes about 30 "frames" per second (like a movie camera) and that when the eye is fully dark-adapted, it needs to receive only about 500 visible photons per frame from an object to register it. Out sun radiates a power of about 3.9 x 1026W at all wavelengths, peaking in the yellow region of the spectrum (but only about one-half of this energy is in the visible range). The pupil of your dark-adapted eye has a diameter of about 8 mm. Estimate how far away a star like the sum could be and still be visible to the naked eye. The nearest visible star is about 4 ly away and most stars we see in the sky are hundreds of light years away. What does this mean for most visible stars' intrinsic brightness compared to the sun's intrinsic brightness?