Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.

To calculate the absorption edge of Cadmium telluride (CdTe) in meters, we need to use the formula:

λ = hc / Eg

where:
λ is the wavelength of the absorption edge,
h is the Planck's constant (6.626 x 10^-34 Js),
c is the speed of light in vacuum (3.00 x 10^8 m/s),
and Eg is the band gap of CdTe (1.45 eV).

First, we need to convert energy from electron-volts (eV) to joules (J). Since 1 eV is equal to 1.6 x 10^-19 J, we can convert the band gap Eg as follows:

Eg = 1.45 eV × (1.6 x 10^-19 J/eV)
Eg = 2.32 x 10^-19 J

Now, we can substitute these values into the formula:

λ = (6.626 x 10^-34 Js) × (3.00 x 10^8 m/s) / (2.32 x 10^-19 J)

Calculating this expression gives us:

λ = 8.55 x 10^-7 m

Therefore, the value of the absorption edge for Cadmium telluride (CdTe) is approximately 8.55 x 10^-7 meters.