What is the wavelength of a photon of energy 1 eV ?

Options

A. `12.4xx10^(3)Å`
B. `2.4xx10^(3)Å`
C. `0.4xx10^(2)Å`
D. `1000Å`

Answer

A

Explanation

`p=mc=(mc^(2))/(c)=(E)/(c)=(hv)/(c)=(h)/(lambda)`
`rArr (E)/(c)=(h)/(lambda) rArr E=(hc)/(lambda)`
`rArr lambda=12*375xx10^(3) Å`