There is a simple relationship between the energy for a photon of light ephoton in units of ev (electron volts) and its wavelength λ in nm (nanometers) given by: ephoton (ev) = (1240 ev nm) / (λ nm). for example, if light has a wavelength of 620 nm, then its energy ephoton = (1240 ev nm) / (620 nm) = 2 ev. visible light has photon energies of ~1.7 to 3 ev and wavelengths of ~400 to 750 nm (λblue = 475 nm, λgreen = 510 nm, λyellow = 570 nm, and λred = 650 nm).

what is the wavelength λ in nm for light with a photon energy ephoton = 2 ev?

what is the photon energy for light with a wavelength λ = 630 nm?

in the electromagnetic spectrum, x-rays have much higher photon energies (~100 to 100,000 ev) and shorter wavelengths (~0.01 to 10 nm) than visible light. what is the photon energy for an x-ray with a wavelength λ = 6 nm?

What elements are found in the inner and out core of the earth? the correct layers of earth's interior from the top to the center? what is the unwanted material that is removed from a mine called? how much stronger is an earthquake that registers 5 on the richter as opposed to 2? what occurs at a convergence plate boundary? the majority of the the earth's rock what is the most common element found in the earth's crust? what element is found in pyrite that contributes to acid mine drainage? why must mining companies post bond prior to permitting? how are bacteria being used in treating effluent from mines? what is a problem of acid mine drainage in rivers and soils? what do tectonic plates move on? why is gold smelting so damaging? how are artesian wells formed? where is dammed water colder than the river it flows into? what is one of the problems of uncontained aqueducts? what is the largest use of industrial water? underground sand and gravel formations that can store water? what type of water test measure acidity? which type of water test for cloudiness from suspended solids? what water test measures the amount of calcium and magnesium? these are all problems of coal power plants all of the following are advantages of riparian lands along rivers what type of water would be the warmest and have the least amount of dissolved oxygen? the zone of aeration is

This is the substance(s) formed in a chemical reaction.

This is one type of line graph in which the independent variable is time plotted on the x axis and the dependent variable, also numerical, is plotted on the y axis.