Microwaves range in wavelength from about 2.0 $\times$ 10^-2 cm to about 5.0 cm.What is the maximum energy in eV that a microwave may have? A)0.025 meV B)6.2 meV C)2.5 eV D)6.2 eV E)0.62 meV

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Quizplus · Accepted Answer

The energy of a photon can be calculated using the equation $E = \frac{hc}{\lambda}$, where $h$ is Planck's constant ($6.626 \times 10^{-34}$ J·s), $c$ is the speed of light ($3.00 \times 10^8$ m/s), and $\lambda$ is the wavelength in meters. For the maximum energy, we use the shortest wavelength given, which is 2.0 cm or 0.02 m. Converting the energy to electron volts (1 eV = $1.602 \times 10^{-19}$ J), the calculation for the energy yields a value in the millielectronvolt (meV) range, closest to the option of 6.2 meV.

Microwaves Range in Wavelength from About 2 ×\times× 10-2 Cm to About 5

Microwaves Range in Wavelength from About 2 $\times$ 10^-2 Cm to About 5