What is the wavelength λ of the photon that has been released by−2.05×10−18 J?

E = hc/wavelength

To find the wavelength (λ) of a photon, you can use the formula:

λ = c / ν

Where:
λ is the wavelength of the photon
c is the speed of light (approximately 3.00 x 10^8 m/s)
ν is the frequency of the photon

In this case, you are given the energy of the photon as -2.05 x 10^-18 J. The energy of a photon can be calculated using the formula:

E = h * ν

Where:
E is the energy of the photon
h is Planck's constant (approximately 6.63 x 10^-34 J·s)

We can rearrange this formula to solve for the frequency (ν):

ν = E / h

Now, we can substitute the given energy (-2.05 x 10^-18 J) into the formula to find the frequency.

ν = (-2.05 x 10^-18 J) / (6.63 x 10^-34 J·s)

By calculating this expression, we find the frequency (ν) of the photon.

Finally, we can substitute the found frequency into the wavelength formula to solve for the wavelength (λ):

λ = (3.00 x 10^8 m/s) / ν

By evaluating this expression, we can find the wavelength (λ) of the photon.