Short-wavelength UV is sometimes called vacuum UV, because it is strongly absorbed by air and must be studied in a vacuum. Calculate the photon energy in eV for 100-nm vacuum UV…

Question

asked Dec 13, 2020 225k views

1 Answer

Glarkou · Answer 1 · 2020-12-18T19:27:28+0000

Answer:

Energy of photon, E = 12.43 eV

Step-by-step explanation:

It is given that,

Wavelength of UV vacuum,
$\lambda=100\ nm=10^(-7)\ m$

Energy of photon is given by :

$E=(hc)/(\lambda)$

h = Planck's constant

c = speed of light

E=(6.64* 10^(-34)* 3* 10^8)/(10^(-7))

$E=1.99* 10^(-18)\ J$

or

$E=(1.99* 10^(-18))/(1.6* 10^(-19))\ eV$

E = 12.43 eV

So, the energy of the photon is 12.43 eV. Hence, this is the required solution.