Arecent study found that electrons that have energies between 3.45 ev and 20.9 ev can cause breaks in a dna molecule even though they do not ionize the molecule. if a single photon were to transfer its energy to a single electron, what range of light wavelengths could cause dna breaks?

5.95 nm to 33.6 nm

Explanation:

Energy of a single photon can be written as:

where, h is the Planck's constant, c is the speed of light and λ is the wavelength of light.

Consider the lowest energy of an electron that can break a DNA = 3.45 eV

1 eV = 1.6 ×10⁻¹⁹ J

⇒3.45 eV =  5.52×10⁻¹⁹ J

Consider the highest energy of an electron that can break a DNA = 20.9 eV

1 eV = 1.6 ×10⁻¹⁹ J

⇒20.9 eV =  33.4×10⁻¹⁹ J

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask