Question

Find the wavelength (in nm) of a 2.52 eV photon. a. 492.34127 nm.b. 585.88611 nm.c. 541.5754 nm.d. 418.49008 nm.

Answer 1

The correct option is (a).

Step-by-step explanation:

Given that,

The energy of photon, E = 2.52 eV

We need to find the wavelength of the photon in nm. The formula for the energy of a photon is given by :

`E=(hc)/(\lambda)\\\\\lambda=(hc)/(E)\\\\\lambda=(6.63* 10^(-34)* 3* 10^8)/(2.52* 1.6* 10^(-19))\\\\=4.93* 10^(-7)\ m\\\\=493\ nm`

The nearest option is a) i.e. 492.34127 nm.