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A certain light has an energy of 4.86×10-20 J. What is the wavelength of this light?

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Related questions

Fluorescence is a process where a molecule absorbs a photon and then emits a photon of lower energy. Napthalene absorbs photons with a wavelength of 270 nm and emits a photon with a wavelength of 349 nm. If 4.86 mL of a 0.196 napthalene solution is irradiated with 270 nm light and 8.13e-21 J of energy are emitted, what percentage of the napthalene molecules emitted a photon?

Hi, im a student in honors chemistry and i need help working on some problems. we are working on Planck's constant theory and one of the problems say A certain light has an energy of 4.86x10-20 J. what is the wavelength of this light? i don't know how to work it out.

a) What color of light is associated with an energy of 3.865 x 10−19−19 J?

b) A laser gives red-orange light of wavelength 638.2 nm. Calculate the energy in kJ of 1 mol of photons at this wavelength.

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